10-Day Europe Itinerary: France–Italy–Spain with One eSIM

29 Oct 2025

Planning a Europe itinerary 10 days long that hits France, Italy and Spain is absolutely doable—if you keep the route tight and the logistics simple. This guide gives you a realistic, high-speed-train-first plan from Paris to Lyon to Milan and Rome, a taste of Florence, and a finale in Barcelona. You’ll carry one regional eSIM the whole way, so your maps, tickets and translators work across borders without swapping SIMs or hunting Wi‑Fi. Expect 2–3 hours on trains most move days, one short flight at the end, and well-paced city time where it matters. We’ve included setup steps for your eSIM, the right roaming toggles, typical 4G/5G speeds by city, and pro tips to keep things moving. If you need deeper country specifics, see our France, Italy and Spain eSIM guides linked throughout.

Route at a glance (map this line on your phone)

Day 1–3: Paris, France (arrive CDG/ORY)

Day 4: Lyon, France (TGV from Paris, ~2h)

Day 5: Milan, Italy (Frecciarossa from Lyon Part‑Dieu, ~5h15)

Day 6–7: Rome, Italy (Frecciarossa from Milan, ~3h10)

Day 8: Florence, Italy (Frecciarossa from Rome, ~1h35)

Day 9–10: Barcelona, Spain (morning flight from Florence or Rome, ~1h45; final night and departure)

Why this works: - You travel mostly by direct high‑speed trains. - Only one short flight (Italy to Spain) to avoid a 12–14 hour overland slog. - Big‑city anchors with one smaller-city palate cleanser (Lyon and Florence).

For more country picks or alternates, browse Destinations.

One eSIM for three countries (Western Europe plan)

Use a single regional plan that roams seamlessly across borders. The Esim Western Europe option covers France, Italy and Spain on major networks with automatic network selection. You keep the same QR/profile the entire trip.

Suggested data allowance for 10 days: - Light user (messaging, maps, email): 5–8 GB - Moderate (social, a few video calls, city navigation): 10–15 GB - Heavy (HD streaming, frequent tethering): 20+ GB

Country-specific tips and network notes: - France: Orange, SFR, Bouygues, Free Mobile are common. See Esim France for city nuances and coverage quirks. - Italy: TIM, Vodafone, WindTre, Iliad. See Esim Italy for rail corridor coverage and 5G availability. - Spain: Movistar, Orange, Vodafone, Yoigo. See Esim Spain for Catalonia and coastal speed notes.

Typical city speeds (real-world ranges vary by street and time of day): - Paris: 4G 30–80 Mbps; 5G 120–300 Mbps - Lyon: 4G 25–70 Mbps; 5G 100–220 Mbps - Milan: 4G 35–90 Mbps; 5G 120–250 Mbps - Rome: 4G 25–70 Mbps; 5G 100–220 Mbps - Florence: 4G 20–60 Mbps; 5G 90–180 Mbps - Barcelona: 4G 35–90 Mbps; 5G 130–300 Mbps

If speeds dip indoors or in historic centres with thick stone, move closer to a window or switch networks manually (see steps below).

eSIM setup and roaming toggles (How‑to)

Follow this before you leave or on hotel Wi‑Fi on arrival.

1) Buy and install - Purchase your regional plan: Esim Western Europe. - iPhone: Settings > Mobile Data > Add eSIM > Use QR code or “Use activation code”. - Android (varies): Settings > Network & Internet > SIMs > Download a SIM > Add via QR/activation code. - Name the line “EU Data” for clarity.

2) Set data line and keep your number - Keep your physical/home SIM for calls/SMS (if needed). - Set “EU Data” as “Mobile Data” line; disable “Allow Mobile Data Switching” if you want to force data to eSIM only. - Turn OFF data roaming on your home SIM to avoid surprise charges.

3) Roaming and 5G toggles - Turn ON Data Roaming for the “EU Data” eSIM. - Preferred network: 5G Auto (iOS) / 5G preferred (Android) if your plan includes 5G; otherwise LTE/4G. - Low Data Mode/Data Saver: OFF unless you’re trying to conserve.

4) APN check - Most plans auto‑configure. If not, enter the APN provided in your eSIM email/profile. If no APN is listed, leave default; do not guess as it can block data.

5) Crossing borders - Keep the eSIM active; it will register on a local partner within 1–3 minutes. - If no data after 3–5 minutes: toggle Airplane Mode ON/OFF, then manually select a network: Settings > Mobile Network > Network Operators > choose a listed partner.

6) Tethering/hotspot - Supported on most plans; check your plan details. Enable only when needed to conserve data.

Pro tip: Download offline maps for Paris, Rome and Barcelona on Google Maps and your train e‑tickets into your wallet app before each move day.

Day-by-day: 10 days from Paris to Barcelona

Day 1 – Paris: Arrive and orient

Arrive CDG/ORY. Activate eSIM on Wi‑Fi if not already installed.
Afternoon: Île de la Cité (Notre‑Dame exterior), Sainte‑Chapelle, and a Seine walk to the Louvre courtyards.
Evening: Latin Quarter or Canal Saint‑Martin for a casual first meal.
Connectivity tip: Expect excellent 5G around central arrondissements, but the Louvre basement and Metro tunnels can throttle to 4G.

Day 2 – Paris: Classics efficiently

Morning: Louvre (time‑slot ticket), Jardin des Tuileries.
Afternoon: Eiffel Tower/Trocadéro viewpoints; pre‑book summit if you must go up.
Evening: Seine cruise or rooftop sunset (Galeries Lafayette Haussmann terrace).
Transport: Metro day pass; Apple/Google Pay taps work on many gates.

Day 3 – Paris: Neighbourhoods and food

Morning: Montmartre loop (Sacré‑Cœur, Rue Lepic).
Lunch: Marché des Enfants Rouges or Rue Cler.
Afternoon: Musée d’Orsay or Pompidou (shorter queues later in day).
Dinner: Bistro near Le Marais. Pack tonight for an early train.
For network specifics and tips, see Esim France.

Day 4 – Paris to Lyon (2h TGV) + Old Lyon

Train: Paris Gare de Lyon → Lyon Part‑Dieu (~2h; book seats in advance).
Drop bags; tram to Vieux Lyon. Walk the traboules, Fourvière hill for views.
Dinner: Bouchon menu (book ahead).
Practical: Lyon 5G is strong in Presqu’île; coverage softens in some Renaissance alleys—download dinner directions before you wander.

Day 5 – Lyon to Milan (5h15) + Duomo at dusk

Morning train: Lyon Part‑Dieu → Milano Centrale (direct Frecciarossa; scenic Alps views).
Afternoon: Duomo exterior/rooftop; Galleria Vittorio Emanuele II; aperitivo in Brera.
Tip: Milano Centrale has robust 5G; if your phone clings to 4G, manually select Vodafone or TIM for better station throughput.
For Italy network notes, see Esim Italy.

Day 6 – Milan to Rome (3h10) + Trastevere night

Late morning Frecciarossa to Roma Termini. Hotel check‑in.
Afternoon: Colosseum exterior/Forum views from Via dei Fori Imperiali; sunset in Trastevere.
Data tip: Around the Colosseum, 5G can fluctuate with crowd load; keep offline tickets handy.

Day 7 – Rome: Ancient + Baroque

Morning: Vatican Museums early slot or Colosseum/Forum/Palatine with skip‑the‑line entry.
Afternoon: Pantheon, Trevi Fountain, Spanish Steps (walkable cluster).
Evening: Testaccio for Roman classics.
Practical: Maps can misroute in narrow lanes; rely on saved pins and short bursts of live navigation to conserve data.

Day 8 – Rome to Florence (1h35) + Renaissance highlights

Train: Roma Termini → Firenze S. M. Novella.
Day plan: Duomo exterior (time slot for the dome if you want the climb), Piazza della Signoria, Ponte Vecchio, Uffizi late‑day entry.
Night: Pack for an early flight to Spain tomorrow.
Connectivity: Florence’s historic core has patchy 5G inside thick‑walled buildings—step outside for stronger signal.

Day 9 – Florence (or Rome) to Barcelona (1h45 flight) + Gothic Quarter

Morning flight to BCN (flights also run from Pisa; Rome has more frequency if you prefer to fly from there).
Aerobus/metro into the city. Gothic Quarter walk: Cathedral, Plaça Reial, La Rambla (stay pickpocket‑aware).
Speed note: Barcelona’s 5G is widely deployed; 150–300 Mbps isn’t unusual outdoors.

Day 10 – Barcelona: Gaudí and beach time

Morning: Sagrada Família (pre‑book timed entry).
Afternoon: Park Güell, then Barceloneta or El Born tapas crawl.
Evening: Sunset at Bunkers del Carmel or Montjuïc.
For more on Spain coverage and regional nuance, see Esim Spain.

Getting between stops: booking and seat strategy

Book high‑speed trains 2–4 weeks ahead for best fares and seat choice.
TGV (France) and Frecciarossa (Italy) require seat reservations; sit on the aisle if you plan to work, window for scenery on Lyon–Milan.
Keep e‑tickets in your wallet app and PDFs offline. Station Wi‑Fi can be busy.
For the Italy–Spain leg, a morning flight maximises day time on the ground and reduces disruption if delayed.

Data discipline that stretches your gigabytes

Download city areas on offline maps and Spotify/YouTube playlists on hotel Wi‑Fi.
Toggle low‑data mode during intercity trains when you’re just messaging.
Prefer 720p for video calls; switch off HD if your signal steps down to 4G.
Turn off background app refresh for heavy apps (social, cloud photos) on move days.

Troubleshooting on the move

No data after border crossing: Airplane Mode 10 seconds > OFF; then manually select a partner network.
Good signal bars, slow speeds: move outdoors, toggle 5G/LTE, or switch network operator.
QR lost: Most providers let you reissue from account portal/support (keep your order number).
Hotspot not working: Reboot the phone; confirm tethering is included in your plan; check APN isn’t blank.

Who this itinerary suits (and who should tweak it)

Best for: First‑timers who want flagship sights with fast intercity links and minimal airport time.
Tweak if: You dislike one‑night stops—drop Lyon or Florence and add that night to Paris or Rome.
Travelling as a team? See For Business for pooled data and device management.
Travel trade or creators? Our Partner Hub has co‑marketing and affiliate options.

Alternatives and add‑ons

Starting in the US or transiting stateside? Pre‑arrange stateside coverage via Esim United States.
Continuing to Canada/Mexico after Spain? Switch regions with Esim North America.
Want different countries? Explore regional options on Destinations.

FAQ

1) Do I need multiple eSIMs for three countries? - No. A single Esim Western Europe plan covers France, Italy and Spain with automatic network selection.

2) How much data should I buy for 10 days? - Most travellers are comfortable with 10–15 GB for maps, socials, light streaming and a few video calls. Heavy streamers/tethering users should consider 20+ GB.

3) Will I get 5G everywhere? - Major city centres and many train corridors have 5G, but it can drop to 4G indoors, in historic districts, tunnels or rural stretches. Your phone will fall back automatically.

4) Can I keep my WhatsApp and number while using an eSIM? - Yes. Keep your home SIM active for calls/SMS (roaming off if you want to avoid charges) and set the eSIM as the data line. WhatsApp continues with your existing number.

5) My data stops working when I cross a border. What now? - Wait 1–3 minutes, toggle Airplane Mode, then manually pick a partner network in settings. Ensure Data Roaming is ON for the eSIM and APN is present.

6) Is train Wi‑Fi reliable? - It’s hit‑and‑miss. Use your eSIM for consistent service; expect drops in tunnels and rural valleys. Download heavy files before boarding.

Next step: Choose your cross‑border plan and install it before you fly. 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

Best eSIM for Europe (2025): Plans, Coverage, Fair-Use

Choosing the best eSIM for Europe in 2025 comes down to what you actually do on the road: how many countries you’ll cross, how much data you burn, whether you need 5G, and if hotspot tethering matters. Pricing is competitive, but not all “Europe” eSIMs are equal—some throttle after small “unlimited” buckets, some exclude popular destinations, and others won’t let you tether at all. This guide compares Europe-ready eSIMs by price per GB, 5G access, hotspot policy, and fair-use rules, so you don’t discover limits at the worst time (like mid-ride-share across borders).For most travellers, Simology’s regional plan is a standout: consistent 4G/5G coverage across key countries, transparent allowances, hotspot enabled, and simple top-ups. If you’re mainly in one country, a local eSIM (e.g., France, Italy, Spain) can push price per GB down even further. Flying via the US or Canada? Pair a Europe eSIM with a North America plan to stay connected gate-to-gate. Below is how to choose, what to expect, and the fastest way to avoid fair-use surprises.Quick verdict: the best eSIM for Europe in 2025Best overall for multi-country trips: Simology Esim Western Europe — multi-country coverage, hotspot allowed, fair-use clearly stated, easy top-up.Best value if staying in one country: Simology country eSIMs such as Esim France, Esim Italy and Esim Spain — usually the lowest price per GB.Best for transatlantic travellers: Pair Esim United States or Esim North America with a Europe plan for seamless coverage on both sides.Best for teams and frequent flyers: Managed accounts via For Business — pooled visibility, cost control, consolidated billing.If you’re unsure which countries are covered, start with the full list on Destinations.How we compared Europe eSIMsPrice per GB: Divide plan price by included GB. Ignore “unlimited” claims unless a clear daily/total high-speed cap is disclosed.Coverage footprint: Number of countries, inclusion of the big four (France, Italy, Spain, Germany) plus the UK, Nordics, Benelux, Portugal, Switzerland and popular Balkans.Network quality: Access to top local operators and 5G in major cities; no permanent throttling.Hotspot/tethering: Explicitly allowed by default.Fair-use policy (FUP): Transparent thresholds, reasonable roaming terms, and no punitive restrictions for normal travel use.Ease of use: Instant delivery, QR installation, quick top-ups, responsive support.Simology’s regional and country eSIMs score well on the above, particularly on price-per-GB transparency and hotspot inclusion.The best Simology picks for EuropeEsim Western Europe — top pick for most travellersWho it’s for: - City-hoppers doing 3–12 countries in one trip - Families or remote workers who rely on hotspot - Travellers wanting simple top-ups and a single eSIM across bordersWhat you get: - Broad multi-country coverage across Western Europe with 4G/5G where available - Hotspot/tethering enabled - Clear, upfront data allowances with straightforward price-per-GB - Friendly fair-use terms intended for travel (not permanent roaming)Why it’s hard to beat: - You avoid the SIM shuffle at borders and keep one APN and one data monitor - 5G in major hubs for quick downloads and video calls - Competitive price-per-GB compared with typical regional packsConsider if: - You’re mostly staying in one country (a local eSIM may be cheaper per GB) - You need calling minutes (data-only eSIMs use VoIP apps; pair with your primary SIM for voice/SMS)Check availability and covered nations on Esim Western Europe and confirm your route against Destinations.Country eSIMs — the best price per GB when you stay putIf your itinerary centres on a single country, local plans often win on value and sometimes on peak speeds.France: See Esim France for dense 5G in Paris, Lyon, Marseille and strong rail-corridor coverage. Excellent for city weekends and Riviera road trips.Italy: Esim Italy offers solid 5G in major cities and coastal belts; good for hotspots on trains and ferries.Spain: With Esim Spain, coverage is wide across cities and islands; great for digital nomads needing steady tethering.Choose a country eSIM when: - You won’t cross borders or only do a quick day trip - You want the lowest cost per GB and plan to stream or hotspot frequentlyTransatlantic and multi-region itinerariesConnecting through North America? Avoid airport Wi‑Fi hunting by pairing your Europe eSIM with a North America plan:USA only: Esim United StatesUS/Canada/Mexico: Esim North AmericaInstall both profiles before you fly, then toggle data lines per region. If you’re organising trips for teams or events, centralise management with For Business. Travel brands and creators can explore partnerships via the Partner Hub.Fair-use policies in Europe explained (and how they affect you)Fair-use policies exist to prevent abuse of roaming and unlimited plans. Here’s what matters in practice:Roaming vs “local”: Most Europe eSIMs are regional roaming bundles. That’s fine for travel, but networks may apply FUP while roaming, such as deprioritisation or caps during congestion.“Unlimited” usually isn’t: High-speed data often has a daily or total cap (e.g., 1–5 GB/day at full speed, then throttled). If a plan says unlimited, look for the high-speed allowance first.Hotspot limits: Some providers block tethering or throttle hotspot specifically. Simology plans allow hotspot by default unless stated otherwise.Country exclusions: Not every “Europe” plan includes Switzerland, the Balkans or microstates. Confirm the exact list on Destinations.Usage window: Plans run for a set validity period from first activation; unused data may not roll over.Practical takeaways: - Pick a plan with a clear high-speed allowance if you work on the go. - Expect speed variation at busy times or on rural routes; try different network selections if your device allows. - For long trips, buy a sensible base allowance and top up rather than chasing “unlimited”.Step-by-step: how to choose the right Europe eSIM1) Map your route - List every country and the number of days in each. - If 3+ countries, lean towards Esim Western Europe; otherwise a country eSIM may be cheaper.2) Estimate your data need - Light (maps, messages, occasional rides): 3–5 GB/week - Moderate (social, short video, hotspot for email): 6–10 GB/week - Heavy (HD video, frequent hotspot/video calls): 12–20 GB+/week3) Decide on 5G vs 4G - If you upload media, join video calls, or plan to tether often, choose 5G access where available.4) Confirm hotspot - Ensure your plan explicitly allows tethering if you’ll share data to a laptop or tablet.5) Plan your dual-SIM setup - Keep your home SIM active for calls/SMS, but set the eSIM as your data line and switch data roaming off on your primary SIM to avoid bill shock.6) Check device compatibility - Most recent iPhone, Samsung Galaxy, Google Pixel and other flagships support eSIM. If unsure, consult your device specs.7) Buy and install early - Purchase from Simology, scan the QR code, and add the eSIM before departure while on good Wi‑Fi.8) Test and label - Toggle mobile data to the eSIM briefly at home to confirm activation. Name it “Europe Data” (or country) to avoid confusion.Activation and on‑trip checklistBefore you fly: - Install your eSIM profile over Wi‑Fi. - Set the eSIM as “Mobile Data” line; turn data roaming off on your primary SIM. - Download offline maps; update apps while on Wi‑Fi.On arrival: - Toggle the eSIM data line on. - Ensure Data Roaming is enabled for the eSIM line. - If speeds seem slow, briefly toggle Airplane Mode or select a different partner network in Settings.During your trip: - Monitor data usage in your phone settings. - Hotspot when needed; disable when idle to save battery and data. - Top up through your Simology account if you’re running low.Pro tips to save data and avoid surprisesUse Low Data Mode/ Data Saver on your phone.Disable auto-play for video in social apps.Cache music and podcasts on Wi‑Fi.Prefer Wi‑Fi for big backups; pause cloud photo sync while roaming.Use Wi‑Fi calling for voice; WhatsApp/FaceTime use your existing number even on a data-only eSIM.For road trips, keep offline maps for every country you’ll cross.If you’ll be in the US before/after Europe, install Esim United States or Esim North America in advance.FAQ: Europe eSIMs1) Will my phone work with a Europe eSIM? - Most recent iPhone (XR/XS and newer), Google Pixel (3 and newer), and flagship Samsung devices support eSIM. Region-specific models vary. If in doubt, check your device settings for “Add eSIM” or consult the manufacturer’s specs.2) Can I use hotspot/tethering with Simology eSIMs? - Yes, Simology plans allow hotspot unless stated otherwise on the specific product page. Tethering performance depends on local network conditions.3) How fast is 5G in Europe? - In major cities, typical real-world 5G ranges from 150–500 Mbps, with higher peaks possible. Speeds vary by network, location, and time of day, and can be managed during congestion.4) I’m visiting 8–10 countries in two weeks. What’s best? - A regional plan like Esim Western Europe keeps things simple across borders. If you’ll spend 5+ days in a single country with heavy usage, add a local eSIM (e.g., Esim France or Esim Italy) for cheaper per‑GB data during that block.5) Do I need to show ID to buy an eSIM in Europe? - Most data-only eSIMs in Europe do not require ID, but requirements vary by country. If verification is required, Simology will prompt you during checkout.6) Can I keep my WhatsApp number and receive texts from my bank? - Yes. Your WhatsApp stays linked to your number. Keep your physical SIM active for SMS; set the eSIM as data-only and turn off data roaming on the primary SIM to avoid charges.The bottom lineThe best eSIM for Europe is the one that matches your route, data habits, and need for 5G and hotspot. For most travellers crossing multiple borders, Simology’s Esim Western Europe combines solid coverage, transparent allowances, and tethering without hoops. If you’ll camp in one country, local eSIMs like Esim France, Esim Italy or Esim Spain usually deliver the lowest price per GB. Flying via the US or Canada? Add Esim United States or Esim North America for smooth connectivity end to end.Next step: Compare coverage and pick your plan on Esim Western Europe.

30 Oct 2025

Simology API & SDK: Quick Start for Catalog, Checkout & Activation Webhooks

Integrating Simology’s eSIM into your app or site should be quick, safe and predictable. This guide shows you how to stand up a working flow end‑to‑end: pull a live catalogue, create a checkout, and handle activation webhooks to deliver eSIM credentials. You’ll get example endpoints, headers, sample payloads, sandbox tips, and robust error and retry strategies so you can go live with confidence.We assume you’re building for travellers and want a clean, reliable purchase and activation journey. The same patterns apply whether you’re selling a single-country plan like Esim United States or regional bundles such as Esim Western Europe and Esim North America. If you’re still shaping your plan range, explore available markets on Destinations and see what resonates with your audience. When you’re ready to partner, head to the Partner Hub or our For Business page to get access.What you’ll buildA minimal, production‑ready integration includes:Catalog: Fetch plans (SKU, coverage, allowance, validity, price) and display them.Checkout: Create an order/checkout session and direct the user to pay.Webhooks: Receive order status and eSIM activation credentials securely.Activation: Present LPA QR or SM‑DP+ + activation code in your UI.Post‑purchase: Poll or subscribe to status updates; offer top‑ups if supported.PrerequisitesA Simology partner account with API credentials: request access via the Partner Hub.Sandbox environment enabled (for test cards and simulated activations).Public HTTPS webhook endpoint (TLS 1.2+, supports POST, returns 2xx on success).Server ability to store secrets and verify signatures.Optional: SDK installed (Node.js or Python) or curl for initial testing.Tip: While you prototype, use live product copy from Destinations. For regional content and FAQs, see Esim France, Esim Italy and Esim Spain.Environments and authenticationTypical environment split:Sandbox base URL (example): https://sandbox-api.simology.ioProduction base URL (example): https://api.simology.ioAuthentication:Use the HTTP header: Authorization: Bearer YOUR_API_KEYSend JSON: Content-Type: application/jsonUse idempotency for POSTs: Idempotency-Key: a-unique-uuid-per-intentPro tips: - Rotate keys regularly; keep them server-side only. - Scope keys to least privilege; separate sandbox and production keys. - Log the response header request_id (if provided) for faster support.Step 1: Fetch the eSIM catalogueEndpoint (example): - GET /v1/catalog?country=US - GET /v1/catalog?region=western-europeExample request:GET /v1/catalog?country=US HTTP/1.1 Host: sandbox-api.simology.io Authorization: Bearer sk_sandbox_123 Accept: application/json Example response:{  "items": [    {      "sku": "US-5GB-30D",      "name": "United States 5 GB / 30 days",      "region": "US",      "coverage": ["US"],      "data_allowance_mb": 5120,      "validity_days": 30,      "price": { "amount": 14.99, "currency": "USD" },      "activation_method": "lpa",      "esim_type": "data",      "terms_url": "https://simology.io/esim-united-states",      "available": true    }  ],  "updated_at": "2025-01-10T09:12:44Z" } Implementation notes: - Cache catalogue responses for several minutes; invalidate on webhook or daily refresh. - Use query params to filter by country/region to reduce payloads. - Map regional SKUs to your UX—e.g., “Western Europe” → Esim Western Europe.Pro tips: - Localise currencies client-side only if your payment provider requires it; keep SKU and currency from the API authoritative. - Surface coverage and validity clearly; travellers value transparency.Step 2: Create a checkout session (order)Endpoint (example): - POST /v1/checkout/sessionsExample request:{  "customer": {    "email": "alex@example.com",    "country": "GB"  },  "items": [    { "sku": "US-5GB-30D", "quantity": 1 }  ],  "success_url": "https://yourapp.example/checkout/success?session_id={SESSION_ID}",  "cancel_url": "https://yourapp.example/checkout/cancel",  "metadata": {    "user_id": "u_789",    "source": "ios-app"  } } Example response:{  "id": "cs_abc123",  "payment_url": "https://pay.sandbox.simology.io/cs_abc123",  "status": "pending",  "expires_at": "2025-01-10T09:27:44Z" } Redirect the user to payment_url.On success, Simology will send a webhook (see next step) such as checkout.completed or order.paid.Error example:{  "error": {    "code": "sku_unavailable",    "message": "Requested SKU is not available in the selected region.",    "request_id": "req_9x8y7z"  } } Pro tips: - Always include a unique Idempotency-Key on POSTs to prevent duplicate orders. - Do not fulfil on the browser redirect alone; wait for the signed webhook.Step 3: Webhooks for checkout and activationExpose a POST endpoint, e.g., https://yourapp.example/webhooks/simologyExpected events (names may vary by integration): - checkout.completed — customer returned from payment - order.paid — funds confirmed; fulfilment can begin - activation.ready — eSIM credentials ready for delivery - order.failed or payment.failed — handle gracefullySecurity: - Simology signs webhook payloads. Expect a header like: - Simology-Signature: t=1736500000,v1=hex-hmac-sha256 - Verify HMAC using your webhook secret and the raw request body + timestamp t. - Reject if signature invalid or timestamp skew > 5 minutes.Example webhook: order.paid{  "type": "order.paid",  "id": "evt_123",  "created": "2025-01-10T09:20:02Z",  "data": {    "order_id": "ord_456",    "session_id": "cs_abc123",    "items": [      { "sku": "US-5GB-30D", "quantity": 1, "unit_price": 14.99, "currency": "USD" }    ],    "customer": { "email": "alex@example.com" }  } } Example webhook: activation.ready{  "type": "activation.ready",  "id": "evt_789",  "created": "2025-01-10T09:21:10Z",  "data": {    "order_id": "ord_456",    "line": {      "iccid": "8988307000001234567",      "smdp_plus": "LPA:1$sm-dp-plus.simology.net$ACT-CODE-1234",      "qr_url": "https://sandbox-api.simology.io/v1/qr/ord_456.png",      "valid_from": "2025-01-10T09:21:10Z",      "expires_at": "2025-02-09T23:59:59Z"    }  } } Retries: - Respond 2xx on success within 5 seconds. - Non-2xx triggers automatic retries with exponential backoff (e.g., 1m, 5m, 30m, hourly up to 48h). - Webhooks are idempotent; use the event id to deduplicate.Pro tips: - Store the full webhook event before processing; reprocess safely if needed. - Use a separate signing secret per environment; rotate on a schedule.Step 4: Deliver and activate the eSIMOnce you receive activation.ready: - If you display QR in-app: render qr_url or generate your own QR from the LPA string (smdp_plus). Confirm the screen brightness/instructions for scanning. - If you deliver manually: present the SM‑DP+ address and activation code clearly.UI checklist: - Show coverage and validity (mirror your catalogue details, e.g., Esim North America). - Provide concise device instructions (Settings > Mobile Data > Add eSIM). - Remind users to keep primary SIM for calls/SMS if needed, using data on eSIM. - Offer a link back to plan details (e.g., Esim United States) for FAQs.Step 5: Post‑activation status and top‑upsCommon endpoints (examples): - GET /v1/orders/{order_id} — check latest status. - GET /v1/lines/{iccid} — inspect data used/remaining. - POST /v1/topups — add data to an existing line.Example line status:{  "iccid": "8988307000001234567",  "status": "active",  "data": {    "used_mb": 1200,    "remaining_mb": 3920  },  "valid_until": "2025-02-09T23:59:59Z" } Pro tips: - Cache status for 30–60 seconds to avoid rate limits. - If you surface data usage, include a timestamp and note that roaming networks can report with slight delay.Errors, rate limits and observabilityHTTP status patterns: - 400 validation_error — your request is malformed (missing field, invalid SKU). - 401/403 auth_error — bad or expired credentials, wrong environment key. - 404 not_found — order/line ID not recognised. - 409 conflict — duplicate idempotency key with different payload. - 429 rate_limited — back off using Retry-After header. - 5xx server_error — transient; retry with backoff and jitter.Canonical error body:{  "error": {    "code": "rate_limited",    "message": "Too many requests. Try again later.",    "request_id": "req_123",    "retry_after": 30  } } Best practices: - Always log request_id and error.code. - Implement circuit breakers for persistent 5xx. - Respect Retry-After on 429; apply exponential backoff with jitter. - Use unique Idempotency-Key per action (e.g., “create checkout for cart 123”). - Monitor webhook delivery success rate and age of last processed event.SDK quick startWhile you can integrate with raw HTTP, SDKs speed up auth, idempotency and webhook verification. The shapes below reflect the examples above; adapt to your language and tooling.Node.js (example):import { Simology } from "@simology/sdk"; const sim = new Simology({ apiKey: process.env.SIMOLOGY_API_KEY, baseUrl: "https://sandbox-api.simology.io" }); const catalog = await sim.catalog.list({ country: "US" }); const session = await sim.checkout.create({  customer: { email: "alex@example.com", country: "GB" },  items: [{ sku: "US-5GB-30D", quantity: 1 }],  success_url: "https://yourapp.example/success?session_id={SESSION_ID}",  cancel_url: "https://yourapp.example/cancel" }); Webhook verification (pseudo):app.post("/webhooks/simology", express.raw({ type: "application/json" }), (req, res) => {  const signature = req.header("Simology-Signature");  const event = sim.webhooks.verify(req.body, signature, process.env.SIMOLOGY_WEBHOOK_SECRET);  // process event.type ...  res.sendStatus(200); }); Python (example):from simology import Simology sim = Simology(api_key=os.getenv("SIMOLOGY_API_KEY"), base_url="https://sandbox-api.simology.io") catalog = sim.catalog.list(country="US") Tip: Keep the webhook route using raw body to preserve signature integrity.Security and privacy essentialsStore only what you need (e.g., order_id, sku, iccid). Avoid storing full QR images if the LPA string is sufficient.Encrypt secrets at rest; restrict access via IAM.Validate webhook payload against expected schema before acting.Do not render raw error messages to end users; translate to helpful guidance.Go‑live checklistSandbox to production switch with environment flags.API key rotation plan and secret storage verified.Idempotency implemented on all POST operations.Webhook endpoint verified with signature checks and 2xx acks.Observability: logs capture request_id, event.id, order_id, iccid.Rate limit handling and backoff tested.Happy path and failure path user messaging in place.Regional catalogue mapped to your content (e.g., Esim France, Esim Italy).FAQHow do sandbox and production differ? Sandbox uses test payment and simulated activation events. Payload shapes mirror production, but no real provisioning occurs. Use separate API keys and webhook secrets per environment.Can I test activation without scanning a QR? Yes. Use the LPA string (SM‑DP+ and activation code) from activation.ready to test your UI. In sandbox, you can display it without provisioning a real profile.What happens if my webhook endpoint is down? Simology retries with exponential backoff for a defined window (for example, up to 48 hours). Keep processing idempotent and return 2xx only after you have safely stored/handled the event.How should I handle plan regions in my UX? Keep your SKUs aligned with clear coverage descriptions (country vs region). Link to destination pages like Esim United States or Esim Western Europe for clarity, and aggregate them under Destinations.Can I issue refunds or cancellations via API? Many setups support POST /v1/refunds or cancelling unpaid checkouts. Always wait for webhook confirmation (refund.processed) before altering customer entitlements.Do you support top‑ups and usage queries? Yes in most cases—use the lines and topups endpoints as shown. Cache usage responses briefly and inform travellers about reporting delays when roaming.Next step: Ready to get credentials and sandbox access? Visit the Partner Hub to kick off your integration.

30 Oct 2025