Airport & Underground Coverage: Why Signal Drops and What To Do

31 Oct 2025

Travelling often means jumping from open streets into steel-and-glass terminals and deep underground platforms. It’s no surprise your bars can vanish at the worst moments: boarding passes won’t load, ride-hail pickups fail, and messages loop endlessly. Airport and metro environments are brutal for radio signals, with thick materials, interference, and rapid movement that stress even the best networks. The good news: with a little prep and the right settings, you can keep your phone usable through most weak-signal zones. In this guide, we explain exactly why coverage collapses in airports and tunnels, how modern networks try to fix it (from distributed antenna systems to femtocells and “leaky feeder” cables), and what you can do—step by step—to stay connected. We also cover Wi‑Fi calling as a fallback and what happens if you need to place an emergency call when your device shows no service. If you’re planning trips, we’ll show how the right eSIM choice helps too.

Why airports and subways kill your signal

The physics problem

Materials: Reinforced concrete, metal cladding, and low‑emissivity glass reflect and absorb mobile signals, especially higher‑frequency 4G/5G bands.
Distance and line of sight: You’re often far from macro towers, buried below street level, or behind multiple walls.
Crowds: Thousands of devices in a terminal create contention and interference; uplink (your phone to the network) becomes the bottleneck.

The mobility problem

Handoffs: Moving quickly—airport rail links, shuttles, escalators—forces frequent “handoffs” between cells. If the handoff fails or the next cell is congested, calls drop and data stalls.
Bands and tech mix: Networks may drop you from 5G to 4G to 3G/2G for coverage. Each step down can disrupt active sessions.

The infrastructure gap

Not every venue invests in indoor solutions. Where they do, systems vary:
DAS (Distributed Antenna System): A network of indoor antennas rebroadcasting outdoor cell coverage inside terminals and concourses.
Small cells/femtocells: Mini base stations installed for targeted capacity—lounges, gates, or staff areas.
In tunnels: “Leaky feeder” coaxial cables or dedicated radiating antennas carry mobile signals along the track.
Multi-operator support varies. One operator may have great signal; another may have none.

How networks try to keep you connected

Low-band spectrum: 700–800 MHz bands penetrate buildings better; you’ll often see more bars on these, though speeds may be lower.
Carrier aggregation and DSS: Combine bands or share 4G/5G to keep sessions alive as you move between cells.
VoLTE and VoWiFi: Modern calling stays on 4G/5G or falls back to Wi‑Fi calling, reducing circuit-switched handoff issues.
Priority paths: Airports sometimes prioritise back-of-house and critical services. Public areas may share limited capacity.
Emergency handling: Networks attempt to place emergency calls on any available cell, sometimes even on a rival network, depending on local regulations.

Before you go: a 10‑minute prep checklist

Install a local or regional eSIM - A multi-network or strong local profile can massively improve indoor performance. - Regional options like Esim Western Europe or Esim North America let your phone choose among partner networks. - Check country specifics on Destinations or install a country plan such as Esim United States, Esim France, Esim Italy, or Esim Spain.
Enable Wi‑Fi calling - iOS: Settings > Mobile Data > Wi‑Fi Calling. - Android (varies): Settings > Network & Internet > Mobile network > Wi‑Fi calling. - Confirm your phone shows “Wi‑Fi” or an icon in the dialler when active.
Download essentials for offline access - Boarding passes, rail tickets, hotel directions, offline maps, and translation packs. - Authentication apps: sync or note backup codes to avoid SMS dependency.
Adjust network settings - Prefer 4G/5G Auto; avoid “5G Only”. - Turn on Data Saver/Low Data Mode to handle captive Wi‑Fi and weak uplinks.
Power plan - Weak signal drains batteries fast. Start with 70%+ and carry a power bank.

Pro tip: Add airline and airport apps to “unrestricted battery” so they can load passes on flaky connections.

At the airport: practical tactics that work

Use venue connectivity wisely

Join official airport Wi‑Fi and complete the captive portal; Wi‑Fi calling may not activate until the portal is cleared.
If Wi‑Fi calling still won’t engage:
Toggle Airplane Mode on, then enable Wi‑Fi only to force calling over Wi‑Fi.
Disable VPN temporarily; some VPNs block Wi‑Fi calling’s IMS traffic.
Forget and rejoin Wi‑Fi if the portal pops up again.

Choose your spot

Near windows or open atriums generally improves signal.
Avoid dense metal structures (security lanes) and sublevels when placing important calls.
Lounges may have small cells; a quick signal check can be worthwhile.

Manage handoffs

If a call keeps dropping as you move, step aside and finish the call stationary.
For video calls, switch to audio or pause video while walking between concourses.

If data stalls but bars look fine

Try switching to 4G/LTE from 5G; some indoor DAS nodes still deliver steadier 4G.
Toggle Mobile Data off/on, or briefly toggle Airplane Mode to trigger reselection.
Manually select a different network if your eSIM allows it.

Pro tip: Some gates have better indoor coverage because they sit under newer DAS clusters. If you find one that loads fast, stay put while you upload photos or sync documents.

Underground and on the metro: what’s different

Not all lines have mobile coverage. Some systems cover platforms only, others include tunnels, and some rely purely on station Wi‑Fi.
Coverage can switch every few hundred metres as the train passes tunnel antennas, causing brief dropouts.
Speed matters: fast lines can outrun small-cell footprints, making uplink patchy.

Staying connected below ground

Make Wi‑Fi your default:
Set your phone to auto-join official metro Wi‑Fi; finish any captive portal step at the first station.
Keep Wi‑Fi calling enabled. You can often place calls and send messages between stops.
Prepare for tunnel blackouts:
Queue messages and downloads.
Use offline navigation between stations and refresh when the train stops.
For critical tasks:
Wait for a station with platform coverage.
If you must call, stand near the platform centre where antennas are typically positioned.

Pro tip: If the metro has partial coverage, switch chat apps to “low bandwidth” or audio-only modes to ride out tunnel gaps.

What if you need to call emergency services?

Your phone will attempt to place emergency calls (e.g., 112, 911, 999) on any available network, even if your own provider has no service. This behaviour depends on local regulations and device support but is widely implemented.
If you see “No Service”:
Try the emergency number anyway; the phone will scan for any cell that can carry the call.
Move towards open areas, station entrances, or near windows to improve odds.
Wi‑Fi calling and emergencies:
In many countries, emergency calls are supported over Wi‑Fi calling, but not everywhere. If Wi‑Fi is the only option, complete the captive portal and try—your phone will choose the best available path.
If Wi‑Fi calling is unavailable for emergency calls, the device will attempt cellular instead.
Location sharing:
Modern systems can transmit your location (Advanced Mobile Location/AML) when you call emergency numbers. This may not work over all Wi‑Fi networks.

Note: Rules and capabilities vary by country and operator. If in doubt, move to an area with clear cellular coverage as soon as it’s safe.

Troubleshooting quick wins

Try these in order when signal or data misbehaves:

Toggle Airplane Mode on for 10 seconds, then off.
Turn Wi‑Fi off and on; complete any captive portals.
Switch network mode to 4G/LTE and back to 5G Auto later.
Manually select a different partner network (if your eSIM allows).
Reset network settings only if the above fails (you’ll need to rejoin Wi‑Fi networks).

Pro tip: Save your eSIM QR and plan details offline before you travel in case you need to reinstall after a network reset.

Picking the right eSIM for hard-to-reach places

Prefer plans with multi-network access in your destination so your phone can latch onto the operator with the best indoor/DAS presence.
If you’re visiting multiple countries or transiting through major hubs, regional eSIMs simplify coverage:
Esim Western Europe for intra‑EU travel where metro coverage varies city by city.
Esim North America for the US and Canada, where low-band 5G/4G differs by carrier and airport DAS deployments are uneven.
Country-specific options can outperform roaming in airports with single-operator DAS:
Esim United States
Esim France
Esim Italy
Esim Spain
Check operator notes and airport/metro coverage on Destinations.

For teams on the move, pooled data and policy controls help ensure staff stay reachable in terminals and tunnels. See For Business for options. Venue and travel partners exploring indoor solutions can visit our Partner Hub.

Tech corner: femtocells, DAS, and “leaky feeders” explained

Femtocells and small cells: Low‑power base stations that improve coverage in a small area like a lounge or gate cluster. They attach to backhaul (often fibre) and broadcast licensed spectrum.
DAS: A centralised system that pulls in operator signals and redistributes them via fibre/coax to many indoor antennas. Great for large airports where uniform coverage is needed.
Leaky feeder cables: Special coax that acts like a long antenna, “leaking” RF along tunnels so trains and platforms receive consistent signal. Common in metros and long airport service tunnels.
Handoffs: Your device measures signal quality and the network commands a move to a better cell. In dense or poorly tuned systems, handoffs can fail, causing drops. Staying still during calls helps.

Fast setup steps (iOS and Android)

Force Wi‑Fi calling
iOS: Control Centre > enable Airplane Mode > turn Wi‑Fi back on > ensure “Wi‑Fi” shows in the Phone app status line.
Android: Quick Settings > Airplane Mode > enable Wi‑Fi; confirm Wi‑Fi calling icon in the dialler or status bar.
Lock to LTE temporarily
iOS: Settings > Mobile Data > Voice & Data > 4G.
Android: Settings > Network & Internet > Mobile network > Preferred network type > LTE/4G.
Switch networks
iOS: Settings > Mobile Data > Network Selection > turn off Automatic and pick another partner.
Android: Settings > Mobile network > Network operators > Search networks.

Pro tip: After leaving the airport or surfacing from the metro, return to Automatic network selection and 5G Auto.

FAQs

Why do I have full bars but no data in an airport?
Indoor systems can show strong signal but be congested on the backhaul or uplink. Try switching to 4G/LTE, move to a quieter spot, or use airport Wi‑Fi with Wi‑Fi calling.
Does 5G work underground?
Often only low‑band 5G or 4G is deployed in tunnels. High‑band 5G (especially mmWave) struggles with penetration and is rare below ground.
Will Wi‑Fi calling charge me roaming fees?
Wi‑Fi calling uses the internet, not cellular roaming, but call billing depends on your home operator. For data, airport Wi‑Fi is typically free or time‑limited. Using a local eSIM avoids surprises.
Can I rely on emergency calls without mobile coverage?
Your phone will try any available cellular network for an emergency call. It may also attempt the call over Wi‑Fi if supported. This is common but not guaranteed everywhere.
Why does my battery drain faster in terminals and tunnels?
Phones boost transmit power and scan more aggressively when signal is weak. Use Low Power Mode, keep a power bank handy, and prefer Wi‑Fi when available.
Should I turn off 5G to save battery indoors?
Sometimes. If 5G is weak or inconsistent, locking to 4G can stabilise connectivity and reduce scanning.

The bottom line

Airports and underground systems are challenging radio environments. Expect reflections, rapid handoffs, and capacity crunches—then prepare accordingly: enable Wi‑Fi calling, carry a multi‑network eSIM, download essentials for offline use, and know a few quick toggles to recover service when it falters. With the right setup, you’ll get your boarding pass, message your pickup, and place calls even when your bars dip.

Next step: Choose a regional plan that keeps you covered across borders and terminals. Start with Esim Western Europe.

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Andes Highlights (3 Weeks): Peru–Bolivia–Chile–Argentina Connectivity

Planning a south america itinerary 3 weeks through the high Andes? This route stitches together Peru’s Sacred Valley, Bolivia’s La Paz and Salar de Uyuni, Chile’s Atacama Desert, and northern Argentina’s quebradas or Mendoza wine country—often by long-distance bus and a couple of short flights. Connectivity is different at altitude: coverage is strong in cities but drops in high passes and salt flats; bus Wi‑Fi is patchy; border towns can be blackspots. The smart move is an eSIM with multi‑country coverage, backed by offline maps, offline translations, and a simple routine for crossing borders by bus without losing service. Below you’ll find a practical, connectivity-first itinerary; checklists to prep your phone, apps and documents; and on-the-ground tips for staying online where it matters: booking transport, hailing taxis, backing up photos, and navigating when the signal disappears.If you’re transiting via Europe or North America, you can also add a layover eSIM to stay connected door-to-door. Start with our country list on Destinations, then follow the steps, and you won’t waste time chasing SIM shops at 3,500 metres.The 3‑week Andes route at a glanceWeek 1: Peru (Cusco, Sacred Valley, Machu Picchu) - Fly into Cusco (or Lima then connect). - Base in Cusco; day trips to Pisac/Chinchero/Maras–Moray. - Train to Aguas Calientes; Machu Picchu visit; return to Cusco or continue to Puno/Lake Titicaca.Week 2: Bolivia and Chile (La Paz, Uyuni, San Pedro de Atacama) - Bus/collectivo via Copacabana to La Paz. - Fly or overnight bus to Uyuni. - 3‑day Uyuni–altiplano tour ending in San Pedro de Atacama (Chile).Week 3: Chile and Argentina (Atacama to Salta or Mendoza/Buenos Aires) - Choose: - North: San Pedro to Salta/Jujuy by bus; fly to Buenos Aires. - Or South: San Pedro–Calama flight to Santiago; bus or flight to Mendoza; onward to Buenos Aires.Connectivity notes (quick): - Cities: generally strong 4G/4G+; 5G in major hubs (Santiago, Buenos Aires). - Altitude/rural: expect long no‑signal stretches (Uyuni, altiplano passes, Paso Jama). - Bus Wi‑Fi: often advertised, rarely reliable. Plan to be offline onboard. - Border regions: networks switch; a multi‑country eSIM avoids sudden loss.eSIM vs local SIMs for a 4‑country tripFor a route with multiple borders and remote legs, eSIM wins on time and reliability.What a multi‑country eSIM gets you: - One plan across Peru, Bolivia, Chile, Argentina (check coverage per country on Destinations). - No passport/SIM registration queues at kiosks. - Keep your home number active on the physical SIM for calls/SMS codes. - Instant top‑ups if you burn data on photos or navigation.When a local SIM still helps: - Long stay in one country with heavy data use (e.g., a month in Buenos Aires). - Dead zones where a different local network performs better (rarely worth the hassle on a 3‑week pace).Practical approach: - Use an eSIM as your primary data line across all four countries. - If you find a specific local network far better in one region, add a cheap local SIM and keep the eSIM as backup.Device readiness checklist (before you fly)1) Check eSIM compatibility and SIM‑lock status on your phone.2) Buy and install your eSIM while on home Wi‑Fi. Keep a PDF/printed copy of the QR code.3) Label lines clearly (e.g., “eSIM Andes Data”, “Home SIM”).4) Turn on data roaming for the eSIM; leave roaming off for your home SIM to avoid charges.5) Set up dual‑SIM rules: data on eSIM; calls/SMS default to home SIM if needed.6) Download offline: Google Maps/Organic Maps for all target regions; language packs (Spanish at minimum); bus/air tickets; hotel confirmations.7) Cloud backups: set to upload on Wi‑Fi only; pre‑create shared albums for travel companions.8) Test tethering/hotspot with your laptop/tablet.If you’re transiting popular hubs, consider a short layover eSIM: - USA connections: add an Esim United States or a broader Esim North America.- Europe connections: Madrid/Barcelona? Use an Esim Spain. Paris or Rome? See Esim France and Esim Italy. Multi‑country layovers? Try Esim Western Europe.City‑by‑city connectivity notesCusco & the Sacred Valley (Peru)Coverage: Good in Cusco city; variable in high villages (Maras/Moray) and along Inca Trail approaches.Tips: Download Sacred Valley maps offline; pin viewpoints and ruins. most taxis use WhatsApp—save your accommodation’s number.Machu Picchu/Aguas Calientes: Patchy to none at the citadel. Upload your photos later; don’t rely on live ticket retrieval.Lake Titicaca: Puno and CopacabanaPuno: Reasonable 4G; bus terminals crowded—screenshot QR tickets.Crossing to Copacabana: Expect a signal drop around the border; have directions saved offline.La Paz (Bolivia)Good urban 4G; the cable car network has decent signal but tunnels do not.Yungas/“Death Road” tours: Mountain valleys cause dead zones—share your emergency contacts with the operator, carry a charged power bank, and don’t plan remote calls.Uyuni and the Altiplano (Bolivia to Chile)Uyuni town: OK 4G; ATMs finicky—use Wi‑Fi for banking apps.Salt flats/lagunas: Assume offline for most of the 3‑day tour. Guides often carry satellite phones; agree a pickup time/place in San Pedro and preload your map route.San Pedro de Atacama (Chile)Town: Solid 4G; accommodations often have Wi‑Fi but speeds vary.Geysers, Valle de la Luna: Offline navigation essential; sunrise trips start before mobile networks wake up in some areas.Salta/Jujuy or Mendoza/Buenos Aires (Argentina)Salta/Jujuy: Good city coverage; quebradas have long no‑signal sections.Mendoza: City 4G/5G; vineyards outside town can be patchy.Buenos Aires: Strong 4G/5G; ideal for cloud backups and large downloads before you fly home.Border crossings by bus: step‑by‑stepThe big ones on this route: Peru–Bolivia (Puno/Copacabana), Bolivia–Chile (Uyuni–San Pedro via Hito Cajón), Chile–Argentina (Paso Jama to Salta or Los Libertadores to Mendoza).How to keep service and sanity:1) The day before:- Top up your eSIM data.- Confirm your plan includes both countries you’re entering/leaving.- Download offline maps for both sides of the border and your town of arrival.- Save bus company WhatsApp and terminal address offline.2) On departure morning:- Keep a paper copy or offline PDF of tickets, insurance, and accommodation proof.- Charge phone and power bank; pack a short cable in your daypack.3) On the bus:- Don’t count on bus Wi‑Fi. Keep your eSIM as primary, but expect drops near mountain passes.- If your phone supports it, enable “Wi‑Fi calling” for later when you reach accommodation Wi‑Fi.4) At the border posts:- Data may be unavailable. Keep QR codes and booking numbers offline.- After exiting one country and entering the next, toggle Airplane Mode off/on to re‑register on the new network.- If the eSIM doesn’t attach, manually select a network in Mobile Settings.5) Arrival:- Send your accommodation a quick WhatsApp when you’re back online.- Recheck your eSIM’s data roaming is on; confirm you’re on an in‑country network, not a weak roaming partner.Pro tips: - Dual profiles: If your eSIM allows, keep a secondary profile for a different network in the same country—helpful in border towns.- Cash buffer: Some border terminals don’t accept cards; download a currency converter for offline use.Offline survival kit (5‑minute setup)Maps: Download regions for Cusco, Sacred Valley, Puno, La Paz, Uyuni, San Pedro, Salta/Jujuy or Mendoza, and Buenos Aires.Translations: Download Spanish for offline use; add phrasebook favourites (bus tickets, directions, dietary needs).Documents: Save PDFs of passports, tickets, hotel addresses; star them for quick access.Rides: Screenshots of pickup points; pin bus terminals and hotel doors.Entertainment: Podcasts and playlists for long bus legs, set to download on Wi‑Fi only.Altitude and your tech: what changesCoverage gaps lengthen: Fewer towers at high altitude; valleys can block signal. Assume offline on remote excursions.Batteries drain faster in cold: Keep your phone warm and carry a power bank (10,000–20,000 mAh).Hotel Wi‑Fi may be congested: Schedule big uploads (photo backups, app updates) for big-city stays like Santiago or Buenos Aires.GPS still works offline: Your blue dot shows on offline maps without data—preload everything.Data budgeting for 3 weeksTypical traveller usage across this route: - Messaging/Maps/Bookings: 0.2–0.5 GB/day- Social and photo sharing: 0.3–0.7 GB/day- Occasional video calls/streaming: 0.5–1.0 GB/dayFor a mixed-use trip, plan 15–25 GB for 3 weeks. Heavy creators should double it and upload over hotel Wi‑Fi when possible. If you work remotely, consider a higher‑capacity plan and a backup eSIM; see our guidance on For Business.Practical route with transport and connectivity cuesDays 1–4 Cusco base: Strong city signal; day trips may be spotty—go offline-ready.Days 5–6 Machu Picchu: Expect no service at the ruins; sync tickets ahead.Days 7–8 Puno to La Paz via Copacabana: Border signal drop; re‑register networks after crossing.Days 9–11 Uyuni tour to San Pedro: Treat as offline; charge nightly; carry spare cables.Days 12–14 San Pedro: Stable in town; tours offline; top up data before Paso Jama.Days 15–17 Salta/Jujuy or Mendoza: Good urban 4G; rural patches are offline.Days 18–21 Buenos Aires: Strongest connectivity of the trip; clear your uploads and map downloads for the flight home.Partnering and stopover extrasHospitality and tour operators in the Andes: help your guests stay connected—explore co‑branded solutions via our Partner Hub.Transatlantic flyers: test your eSIM setup on a layover with an Esim United States or Esim Western Europe before hitting high-altitude blackspots.FAQs1) Do I need a local SIM in each country?No. A multi‑country eSIM covering Peru, Bolivia, Chile and Argentina is simpler and works well for a 3‑week pace. Consider a local SIM only if you’ll spend longer in one country and want the absolute best regional coverage.2) Will my WhatsApp number change with an eSIM?No. WhatsApp is tied to your registered number, not your data line. Keep your home SIM active for voice/SMS (roaming off if you wish), and use the eSIM for data—WhatsApp continues as normal.3) Can I hotspot to my laptop or camera?Yes. Enable tethering on your eSIM. Mind your data: cloud backups and OS updates can burn gigabytes—set them to Wi‑Fi only or schedule in big cities.4) What if there’s no signal on the Uyuni/Atacama legs?That’s expected. GPS still works offline. Pre-download maps and translations, carry a power bank, and sync plans with your tour operator before departure.5) Will I get roaming charges at borders?If you’re using a multi‑country eSIM with coverage in both countries, you won’t incur extra roaming fees from your home carrier. Keep roaming off on your home SIM to avoid accidental use.6) I’m connecting via Europe or the US—worth getting a layover eSIM?Yes. It’s an easy way to test your setup and stay reachable. Try Esim North America or country options like Esim Spain, Esim France, or Esim Italy for common hubs.Next step: Browse South America coverage options and build your plan on Destinations.

31 Oct 2025

5G SA vs 5G NSA vs 4G LTE: Real‑World Differences for Travellers

If you travel with a 5G phone, you’ve probably seen network icons flip between LTE, 5G and sometimes 5G+. But what actually changes for you on the road? In short: 4G LTE is the baseline, 5G NSA (Non‑Standalone) rides on a 4G core, and 5G SA (Standalone) runs on a pure 5G core. That core difference affects latency, upload throughput, stability in crowded places, and even battery life. This guide breaks down 5g sa vs nsa in plain English, with a focus on what you’ll notice when tethering, video calling, using maps in busy city centres, and moving across borders. We also share what our Speed Tests suggest across popular destinations, and how to set up your phone for the best result. Expect plenty of 5G NSA while roaming today; 5G SA is growing but still patchy. If you need predictable performance, we’ll show you when to embrace SA—and when to simply lock to 4G LTE to save battery and frustration.Quick definitions (and why they matter)4G LTEThe workhorse network most travellers still rely on. Mature coverage, solid stability, decent downloads, and predictable voice via VoLTE.5G NSA (Non‑Standalone)Uses 5G radio for data but anchors control (and often uplink) on a 4G core. It’s the most common “5G” you’ll see, especially when roaming.5G SA (Standalone)Uses a 5G core end‑to‑end. That unlocks consistently lower latency, faster uploads on the same cell, and new features (e.g., slicing) as networks enable them.Why it matters: - Latency: SA removes 4G core bottlenecks, cutting response times—handy for maps, calls and cloud tools. - Uploads: SA can enable true 5G uplink, boosting video calls and backup speeds. - Battery: NSA can use dual connectivity (4G + 5G), which can drain faster in fringe coverage. SA is often more efficient—when coverage is strong. - Roaming: SA roaming is still limited. Most travel eSIMs attach to NSA or 4G LTE.5g sa vs nsa: what you’ll notice on the roadLatency and responsivenessNSA typically delivers ping times similar to 4G once you factor in the 4G core, often 30–60 ms in good conditions.SA removes the 4G core and can shave meaningful milliseconds—think high‑20s to mid‑30s ms in many cities, assuming decent backhaul.Real‑world impact: maps load a bit snappier, web pages feel more instant, cloud apps and collaboration tools respond quicker, and gaming feels less “sticky.” The difference is most visible under load (busy cells) or when you’re tethering a laptop.Uploads: video calls and cloud backupOn NSA, the uplink often still rides 4G, which can cap real‑world upload speeds even when your download looks great.On SA, networks can enable 5G uplink on the same spectrum, delivering noticeably higher upload throughput and lower jitter.Real‑world impact: clearer video calls, quicker photo/video backups, and smoother live streaming from events or viewpoints.Coverage and stabilityNSA tends to be more available because operators can bolt 5G radios onto existing 4G cores. That’s why it’s what you see most when roaming.SA coverage is growing but more concentrated in major urban areas and busy venues. When you do get it, performance is often steadier at peak times.Expect more network “mode flipping” on NSA at cell edges (5G→4G), which can interrupt downloads or calls mid‑handover.Battery life differencesNSA’s dual connectivity can increase radio activity, especially if your phone hops between 5G and 4G frequently.SA can be more power‑efficient because it doesn’t maintain a 4G anchor, but this benefit shows mainly when you have solid SA coverage and a recent modem.Practical tip: if you’re in a fringe 5G area and watching your battery, forcing LTE can extend life without a big hit to usability.Hotspot and tetheringSA’s lower latency and stronger uplink help when tethering multiple devices—uploads, real‑time collaboration, and video calls hold up better.NSA is still fine for general browsing and streaming, but group calls can get choppy when the uplink saturates.Where 5G SA actually helps travellers todayCongested hubs: large stations, stadium districts, city centres at rush hour. SA cores manage traffic more efficiently; uploads and responsiveness hold up better.Video‑forward tasks: live streaming, HD video calls, and rapid photo backups to the cloud benefit from SA’s uplink and lower jitter.Work on the move: if you rely on real‑time tools (Slack/Teams, SSH/RDP, cloud IDEs), SA’s latency advantage is noticeable.Modern devices: newer 5G chipsets (and carrier bundles) squeeze more consistency and efficiency from SA.Pro tip: - If your phone shows 5G but uploads are stuck under 10 Mbps and calls feel laggy, you’re likely on NSA with 4G uplink. Move a block or two, or toggle aeroplane mode; if SA is available, your device may attach to it on reconnection.Country notes and what to expectUnited StatesMajor urban areas increasingly run SA on at least one network. Roamers, however, often land on NSA or 4G depending on agreements and device support. Our advice: expect NSA, enjoy SA where available, and don’t rely on mmWave. Planning a trip? See our country profile: Esim United States.Western EuropeSA rollouts are underway in many capitals and transport corridors, but NSA remains the default roaming experience for now. Expect consistent NSA with bursts of SA in city centres. Explore regional options on Esim Western Europe, and country specifics: Esim France, Esim Spain, and Esim Italy.Cross‑border North AmericaIf you’re moving between the US, Canada and Mexico, pick a plan designed for multi‑country roaming—coverage consistency matters more than chasing SA. Start with Esim North America.City‑by‑city expectationsSA tends to appear first in dense urban cores, new business districts and large venues. Rural and suburban areas often stick with NSA/4G longer. For current notes and crowd‑sourced Speed Tests, browse your target country and city pages via Destinations.For teams and frequent flyers: - If connectivity is mission‑critical, we can help you choose profiles and carriers with the best SA footprint for your itinerary. Learn more For Business or connect via our Partner Hub.How to check and optimise your setupFollow this quick checklist before you fly and when you land.1) Confirm device and OS support- Check that your handset supports your destination’s 5G bands and SA capability. Most flagship phones from 2021 onwards do; mid‑range varies.- Update OS and carrier settings. SA often requires recent carrier bundles.2) Add your eSIM and enable data roaming- Install your Simology eSIM before you depart where possible.- On arrival, toggle data roaming on and wait a minute. If you see 5G right away, great; if not, give it a few minutes and try aeroplane mode on/off.3) Choose the right network mode- iPhone: Settings → Mobile Data → Voice & Data → 5G Auto is a good balance; use 5G On if you specifically want to test SA.- Android (varies): Settings → Network & Internet → SIMs → Preferred network type → Select 5G where available.4) Verify what you’re on- Run a quick speed/latency test in two spots (indoors and outdoors). Note the ping and upload.- If latency is high and upload is weak despite “5G”, you’re likely on NSA; move to a more open area or closer to the city core to try for SA.5) Optimise for your task- Video calls/live streaming: prioritise signal quality (near windows, outdoors). If SA isn’t available, consider 4G LTE if 5G NSA is unstable.- Battery conservation day: lock to LTE, reduce background sync, and use low‑data mode where possible.6) Fix flaky behaviour fast- Toggle aeroplane mode or briefly disable/enable 5G.- If roaming, try the next preferred network in your SIM settings (some profiles allow manual carrier selection).- Reboot if handovers get “stuck” between 5G and 4G.Pro tips: - Don’t chase 5G at all costs. A strong 4G LTE signal can beat a weak NSA signal for practical tasks.- For hotspotting a team, position the phone high and near a window; uplink improves and SA is more likely to attach in stronger signal zones.Real‑world Speed Tests: what we seeFrom our ongoing Speed Tests in major cities, three patterns stand out: - Uploads are the biggest win for SA. In the same cell, SA often delivers 1.5–3× higher uplink than NSA, with less jitter—transformative for HD calls and backups. - Latency is reliably lower on SA, but the size of the improvement depends on the operator’s backhaul and peering. Expect a meaningful reduction rather than miracles. - Downloads vary with spectrum more than SA/NSA status. Wide mid‑band (e.g., 100 MHz) shines on both NSA and SA; SA simply makes it more consistent in crowds.Want to compare by country and city? Browse our live notes via Destinations.FAQIs 5G SA worth it for travellers?Yes—when available. You’ll feel it most in latency‑sensitive and upload‑heavy tasks (video calls, cloud collaboration). But because SA roaming is still limited, plan for strong NSA or LTE as your baseline.Will my travel eSIM get 5G SA or only NSA?It depends on local partners, your device, and carrier agreements. Many roamers attach to NSA today. SA is expanding in big cities; check your destination on Destinations for current notes.Why are my uploads slow even though it says 5G?You’re likely on NSA with a 4G uplink. Move to a stronger signal area, toggle aeroplane mode to re‑attach, or try again in a busier urban zone where SA may be present.Does 5G drain my battery faster than 4G?It can—especially NSA at the edges of coverage. SA can be more efficient in strong coverage. If battery is critical, lock to LTE and re‑enable 5G when you need peak performance.Will 5G work on my older phone?Many 2020–2021 handsets handle NSA well but may lack full SA support on all bands or carriers. Keep your OS and carrier settings updated to unlock the widest compatibility.Do I need special settings for voice on 5G SA?Voice usually runs over VoLTE today; some networks enable VoNR on SA. Ensure VoLTE is on and your carrier settings are current. If calls fail on SA, your phone will typically fall back gracefully.Bottom lineNSA is the 5G you’ll meet most while roaming; it’s faster than 4G for downloads but often feels “4G‑ish” for uploads and latency.SA is the real step forward for responsiveness and uplink—great for work, calls and backups—yet currently concentrated in major hubs.Optimise pragmatically: use SA when it’s strong; prefer LTE over weak NSA to save battery and frustration.Next step: pick your destination and see current network notes and Speed Tests on Destinations. If you’re planning a multi‑country trip, start with Esim Western Europe or Esim North America. For teams, talk to us For Business or via our Partner Hub.

29 Oct 2025

Case Study Template: How a Travel Brand Launched in 6 Weeks (KPIs & Lessons)

Looking to add eSIM to your travel product without becoming a telco? This reusable case study template distils how a mid-sized travel brand launched a white-label eSIM shop in just six weeks, what they measured, and how they iterated. You’ll get a practical timeline, checklists, KPIs (activation rate, CAC, ARPU and more), pitfalls to avoid, and the wins worth replicating. Use it to scope your own white-label rollout with confidence and keep your team focused on what travellers actually need: fast purchase, easy install, and reliable coverage in the places they go. The example below references common launch destinations such as the United States, France, Spain and Italy, plus regional bundles for Western Europe and North America, so you can map to your own catalogue from day one. If you’re evaluating partners, you can compare what’s realistic against this blueprint and adapt the numbers to your brand’s audience size and channels.Who this eSIM case study template is forTravel brands, OTAs and airlines exploring “esim case study white label” optionsFintechs, super-apps and loyalty programmes adding a simple, high-margin travel utilityWholesale/partnership teams validating timelines, KPIs and GTM costsIf you need a quick view of coverage and plans by country, skim the live catalogue at Destinations, including Esim United States, Esim France, Esim Spain, Esim Italy, Esim Western Europe and Esim North America.The 6‑week launch timeline (reusable)This is a realistic, low-lift plan for a white-label eSIM powered by an established provider.Week 1: Discovery and commercial basicsDefine goals: attach rate target, first-90-day GMV, acceptable CAC, initial ARPU target.Choose launch catalogue: 4–6 high-volume routes (e.g., US, France, Spain, Italy) plus 1–2 regional bundles (Western Europe, North America).Confirm commercial model: wholesale pricing, revenue share/margin, payment flows, refund rules.Legal/brand: co-branding, domain/subdomain, T&Cs alignment.Pro tip: Start with 20–30 SKUs max. More choice rarely improves conversion at launch.Week 2: Integration planningSelect integration path: hosted white-label storefront vs. embedded SDK/API.Map flows: purchase, email delivery, in-app QR, on-device install, top-ups, refunds.Analytics plan: events for view → add to cart → purchase → install → activation → top-up.Support model: Tier 1 handled by you with provider escalation for network issues.Checklist - Tracking IDs/UTMs set - Payment processor connected - Support macros drafted - Landing pages and FAQs draftedWeek 3: Build and contentConfigure storefront: brand, colours, copy, pricing rules, currency.Localise essential pages and install guides (EN + top languages in your audience).Add plan cards for Esim United States, Esim France, Esim Spain, Esim Italy.Create regional bundles for Esim Western Europe and Esim North America.Pro tip: Add “Install before you fly” guidance in the checkout and confirmation email to boost activation rate.Week 4: QA and pilotDevice testing: iPhone and Android across 8–10 common models.Pilot cohort: 50–200 real users from your newsletter or loyalty members.Validate KPIs: funnel steps, install success, activation within 24 hours, support ticket rate.Week 5: Go-live and paid mediaLaunch channels: email, app push, post-booking pages, and route-specific pages.Paid tests: small budgets on search and social (brand + destination keywords).Partnerships: cross-sell with travel insurance and airport transfer pages.Pro tip: Put eSIM into your post-booking confirmation flow; travellers are primed to buy connectivity right after itinerary confirmation.Week 6: Optimise and scaleIterate on pricing tiers and bundles.Add top-ups and auto-refill.Roll out additional countries from Destinations.Localise support macros based on real ticket themes.The KPI framework that actually mattersTrack these weekly, then lock a monthly view for management.Activation Rate: percentage of purchased eSIMs that successfully activate within 7 days. Target >90% with clear install guides and pre-travel prompts.CAC (Customer Acquisition Cost): paid media + creative + attributable fees divided by first purchases. Keep under 25–35% of first-order revenue at launch.ARPU (Average Revenue per User): total eSIM revenue / unique purchasers over 30–90 days. Track first-order ARPU and 60-day ARPU including top-ups.Refund Rate: proportion of orders refunded. Target <4%. High refund rates often signal install confusion, not network issues.Attach Rate: percentage of core bookings that include an eSIM add-on. Good early target: 3–7% on relevant routes.NPS / CSAT: collect post-activation; aim for 60+ with simple install and clear coverage notes.Support Ticket Rate: tickets per 100 orders. Target <10/100 after week 2.Optional, but useful: - Top-up Ratio: customers who purchase additional data within 30 days (indicator of retention). - Gross Margin: after wholesale rate, payment fees and refunds. - CLV: early proxy is first order + 60-day top-ups; refine later.Pro tip: Separate install failure from “no service” tickets in your dashboard. The fix for each is different.Example baseline metrics from similar launchesUse these as a starting point; adjust to your brand and channel mix.Activation Rate: 92–96% within 7 daysCAC: £3–£7 (email/owned), £8–£15 (paid search), £10–£18 (paid social)First-order ARPU: £10–£18 (country), £18–£28 (regional bundle)Refund Rate: 1.5–3.5%Ticket Rate: 6–12 per 100 orders (drops below 6 with better guides)Attach Rate (post-booking page): 4–8%Reusable case study outline (fill-in template)Use this structure to document your launch for stakeholders or for partner due diligence.Context - Brand: industry, monthly travellers, top routes - Objectives: revenue, attach rate, NPS, time-to-market - Constraints: dev capacity, support hours, languagesSolution - White-label approach: hosted storefront vs. embedded - Catalogue at launch: list SKUs (e.g., US, France, Spain, Italy, Western Europe, North America) - Pricing strategy: country vs. regional bundle, 7/15/30-day tiers - Support model: Tier 1 scripts, escalation pathImplementation - Timeline: 6 weeks with key milestones - Integrations: payments, analytics, CRM, attribution - Content: install guides, FAQs, post-purchase emails - QA: device matrix, test results, pilot cohortResults (first 60–90 days) - KPIs: Activation, CAC, ARPU, refunds, ticket rate - Revenue and margin: by SKU and channel - Learnings: what moved conversion, what reduced ticketsNext steps - Catalogue expansion from Destinations - Automation: top-up prompts, auto-refill - Localisation and partner bundlesPro tip: Keep the outline in a shared doc and update weekly for the first month; it becomes your internal “runbook”.Pricing, packaging and catalogue strategyKeep it simple: three durations (7, 15, 30 days) and two data tiers per country.Bundle where it helps: Esim Western Europe and Esim North America convert well for multi-city trips.Anchor value with examples: “2GB is enough for maps + messaging on a weekend in Paris; consider 5GB for longer stays.”Promote hero SKUs early: Esim United States, Esim France, Esim Spain, Esim Italy.Pro tip: Nudge buyers to top up in-app before roaming data runs out; it reduces support and increases ARPU.UX and content that drives activationPre-travel prompt: “Install before you fly” banner + email reminder 24 hours pre-departure.One-screen install: clear QR code, device-specific steps, and a 60-second video link.Plain-English coverage notes: where 5G/4G is available; hotspot policy.Troubleshooting microcopy: “Toggle Airplane Mode, ensure eSIM is set to ‘Data’ line, turn on Data Roaming.”Post-purchase checklist:Add eSIMSet as data lineKeep primary SIM for callsEnable data roamingRestart on arrivalPro tip: Show estimated daily usage examples (Maps, WhatsApp, ride-hailing). It reduces “ran out too fast” tickets.Support playbook (Tier 1)Install issues (most common)Ask device model and OSConfirm eSIM is set as the data lineToggle data roaming and restartIf still failing, escalate with order ID and ICCIDNo data on arrivalCheck APN settings (auto vs. manual)Confirm local network availabilityToggle airplane mode, select network manuallyUnexpected consumptionCheck OS updates and background syncSuggest low data mode and turning off iCloud Photos/Drive on mobile dataTarget response under 5 minutes on live chat during business hours; under 2 hours via email.Common pitfalls and how to avoid themToo many SKUs on day oneStart with 6–8. Expand when you see real demand.Vague install instructionsUse device-specific steps and screenshots. Link them in the checkout and email.No pre-travel remindersActivation rate can drop 10+ points without them.Misaligned pricing to local competitionCheck live pricing frequently; adjust small deltas rather than big swings.Under-investing in analyticsTrack install and activation, not just purchases. It’s where experience breaks.Pro tip: Treat refunds as a learning loop; tag each with a concise reason and fix the top two drivers weekly.What made this launch work (wins to replicate)Traveller-first copy and support reduced tickets by 41% after week 2.Regional bundles lifted ARPU by 22% without hurting conversion.Post-booking placement drove a 6.2% attach rate versus 2.1% on generic pages.Pre-departure reminders improved activation from 88% to 95%.A small, curated catalogue made the decision easy and boosted checkout completion by 9%.What to ask a white-label eSIM partnerCatalogue breadth and depth: Are priority markets covered with 4G/5G? See live Destinations.Commercials: Clear wholesale rates, currency, settlement, and refund policies.Integration options: Hosted storefront, SDK or API? Time to live?Analytics: Event-level data for install and activation.Support: SLAs, escalation, and proactive network incident notices.Compliance and security: Data handling, PCI scope for payments, uptime.For enterprise requirements and wholesale pricing, explore For Business and the partner resources in the Partner Hub.Quick launch checklistObjectives set (attach, ARPU, activation)6–8 SKUs selected (US, FR, ES, IT + 1–2 regional bundles)White-label storefront themed and pricedInstall guides and FAQs publishedAnalytics and attribution wiredPilot cohort completed and fixes appliedGo-live across post-booking, email, and appWeekly KPI review and content optimisationFAQ1) What does “white-label eSIM” mean?A ready-made eSIM storefront or component you brand as your own. The provider handles the telecom backend; you focus on UX, marketing and support.2) How fast can we realistically launch?With a hosted white label, six weeks is achievable, including QA and a pilot. Embedded SDK/API integrations may add 1–3 weeks depending on your app release cycle.3) Which destinations should we start with?Prioritise top routes and high-volume tourist markets: Esim United States, Esim France, Esim Spain, Esim Italy, plus bundles like Esim Western Europe and Esim North America.4) How do we keep activation rates high?Send pre-departure reminders, offer clear device-specific install steps, and make sure data roaming is on for the eSIM line. Keep troubleshooting one tap away in the order email.5) What margins are typical?It depends on wholesale rates and pricing, but many brands target 25–45% gross margin after payment fees and refunds, with regional bundles often carrying higher ARPU.6) Do we need 24/7 support from day one?Not necessarily. Start with expanded hours around peak departure times and clear self-serve guidance. Add 24/7 coverage once volumes justify it.Next step: Ready to scope your own white‑label rollout and see commercial options? Visit the Simology Partner Hub.

29 Oct 2025