Travelling with an eSIM should be as simple as scanning a QR code and going online. Most of the time it is. When it isn’t, the culprit is often the APN (Access Point Name) — the tiny configuration that tells your device how to reach the mobile data network. This guide shows you exactly where to find APN settings on iOS and Android (including popular vendor skins), what to fill in, and how to verify it’s working with quick tests. We’ll also cover DNS tweaks that can help on the road and a clean troubleshooting flow to get you connected fast.
Whether you’re heading to the US, France, Italy, Spain or hopping around Esim Western Europe and Esim North America, correct APN settings are the difference between smooth streaming and a blank browser. Keep your provider’s APN values handy, follow the steps below, and you’ll be back online in minutes. For plan options by country, see our Destinations.
What is an APN and why it matters for eSIM data
- APN (Access Point Name) defines the gateway your device uses to access mobile internet.
- With eSIMs, APN is often auto‑provisioned. Sometimes you must enter it manually.
- If the APN is missing or wrong, you’ll have signal bars but no data.
You’ll typically only need to enter: - APN: a short string (e.g., “internet” or provider‑specific) - Username/Password: usually blank - APN Type: “default,supl” - Protocol: IPv4/IPv6
MMS and voice settings are not required for data‑only eSIMs.
Before you start: quick checklist
- eSIM installed and activated on your device
- Mobile Data turned on
- The eSIM set as the active line for Mobile Data
- Data Roaming on (required when abroad, and sometimes even domestically with certain carriers/MVNOs)
- Wi‑Fi off while testing (to ensure you’re using mobile data)
- APN values from your eSIM provider ready
Travelling soon? Explore country packs such as Esim United States, Esim France, Esim Italy and Esim Spain.
iOS: Find and edit APN settings (iPhone/iPad)
Note: On many carriers, iOS hides APN fields because settings are auto‑installed. If you don’t see the menu below, your carrier may not allow manual changes. In that case, re‑installing the eSIM or applying a carrier settings update usually fixes it.
Step‑by‑step: 1. Open Settings. 2. Tap Mobile Data (or Cellular). 3. Tap your eSIM line (labelled with the plan name). 4. Tap Mobile Data Network (or Cellular Data Network). - If this menu is missing, APN is likely auto‑configured. Try a carrier settings update: Settings > General > About (wait for an update prompt). 5. Under Mobile Data, fill in: - APN: enter exactly as provided - Username/Password: leave blank unless specified 6. Personal Hotspot section (if present, may mirror the data APN): - APN: same as Mobile Data (only if instructed by your provider) 7. Go back; iOS saves automatically. Toggle Airplane Mode off/on to refresh.
Pro tips (iOS): - Correct APN spelling matters. Avoid extra spaces. - If you changed APN and nothing happens, restart the phone. - To verify connectivity, open Safari and visit: - http://neverssl.com (loads plain HTTP if you truly have data) - http://captive.apple.com (should show “Success”) - Dual SIM? Ensure your travel eSIM is selected under Mobile Data > Mobile Data.
Android: Find and edit APN settings (by brand)
The path is similar across Android, but menu names vary. After adding a new APN, always save and select it.
Google Pixel / Android (near‑stock)
- Settings > Network & Internet > SIMs.
- Choose your eSIM.
- Access Point Names.
- Tap + (Add) or the plus icon.
- Fill: - Name: any label (e.g., “Travel eSIM”) - APN: as provided - Username/Password: blank unless specified - APN type: default,supl - APN protocol: IPv4/IPv6 - MCC/MNC: leave as‑is (auto from the SIM)
- Save (⋮ menu > Save).
- Tap the new APN to select it.
- Toggle Airplane Mode off/on.
Samsung Galaxy (One UI)
- Settings > Connections > Mobile networks > Access Point Names.
- Select your eSIM if prompted.
- Tap Add.
- Enter APN details (as above).
- Tap ⋮ > Save, then select the new APN.
- Toggle Airplane Mode or restart.
Xiaomi/Redmi/POCO (MIUI/HyperOS)
- Settings > SIM cards & mobile networks.
- Choose your eSIM.
- Access Point Names.
- New APN (+).
- Fill in details, Save, then select it.
- Reconnect mobile data.
OPPO/realme/OnePlus (ColorOS/OxygenOS)
- Settings > Mobile network (or SIM & network).
- Choose the eSIM > Access Point Names.
- Add APN, fill details, Save, select it.
- Toggle Airplane Mode.
Huawei (EMUI)
- Settings > Mobile network > Mobile data.
- SIM management > select eSIM.
- Access Point Names > Add.
- Fill details, Save, select, and reconnect.
Pro tips (Android): - If you don’t see APN, ensure the eSIM is enabled and set as the data SIM. - Use “Reset to default” (⋮ menu) if you’ve tried multiple APNs. - Data Saver or Battery Saver can block background data; disable while testing. - Private DNS can affect captive portals; set to Off/Automatic while activating, then re‑enable.
The exact fields to fill (and what to leave alone)
- APN: Required. Enter exactly as provided.
- Username/Password: Leave blank unless specified.
- APN Type: Use default,supl. Only add dun if instructed (for tethering on certain carriers).
- APN Protocol / Roaming Protocol: IPv4/IPv6 is ideal. Switch to IPv4 if you see IPv6‑related issues (rare).
- MMSC/MMS Proxy/MMS Port: Not needed for data‑only plans.
- Bearer: Unspecified.
- MVNO Type/Value: Leave as‑is unless your provider specifies.
- MCC/MNC: Auto‑filled from the SIM. Do not change.
Formatting gotchas: - Case is usually not sensitive, but use the exact case provided. - Avoid trailing spaces before/after the APN string.
Verify your APN works: simple, reliable tests
Do this with Wi‑Fi off.
- Check the status bar: you should see 3G/4G/LTE/5G with data arrows blinking.
- Open a non‑HTTPS test page: - http://neverssl.com or http://example.com - If you’re behind a captive portal (hotel/airport Wi‑Fi style, unusual for mobile), you’ll be redirected.
- Try https sites: - https://1.1.1.1/help — loads Cloudflare’s connectivity page - A map app (tiles should load quickly)
- Optionally run a speed test after basics work.
- If still no data: - Toggle Airplane Mode - Restart the device - Re‑select your APN - Ensure Data Roaming is enabled
DNS tips for travellers
Most eSIMs work best with the carrier’s DNS. However, if browsing feels slow or certain sites won’t resolve:
- Android Private DNS:
- Settings > Network & Internet > Private DNS
- Try dns.cloudflare.com (Cloudflare) or dns.google (Google). If it breaks captive portals, switch back to Automatic.
- iOS:
- iOS does not offer per‑cellular DNS changes in Settings. For mobile data, you typically use the carrier’s DNS. If you must override, a configuration profile or third‑party app is required — not recommended while roaming.
- APN DNS fields (if visible): Leave blank unless your provider specifies values.
If switching DNS worsens connectivity, revert to Automatic/Off and retest.
Common errors and fast fixes
- APN menu missing (iOS):
- The carrier locks APN edits. Update carrier settings (Settings > General > About), restart, or re‑install the eSIM.
- APN won’t save or won’t stay selected (Android):
- Delete other APNs, save yours, then select it. Reboot.
- Signal but no data:
- Wrong APN or APN type; re‑enter carefully.
- Data Roaming off; turn it on.
- Low Data Mode/Data Saver on; disable temporarily.
- Dual SIM conflict; set the correct SIM for Mobile Data and turn off “Allow Mobile Data Switching” until stable.
- Stuck on 3G/edge speeds:
- Network mode forced to 3G; set to 4G/5G Auto.
- Weak local coverage; try moving near a window or outdoors, or switch network operator manually if allowed.
- After long flights:
- Toggle Airplane Mode.
- Check date/time set automatically — incorrect time can affect auth with some networks.
Region-specific notes for roaming eSIMs
- Many roaming profiles require Data Roaming enabled, even if you’re physically in your home country.
- Some MVNOs in Europe connect via partner networks; keep network selection on Automatic for best results.
- For multi‑country trips, consider bundles like Esim Western Europe or Esim North America to avoid reconfiguring APNs between borders.
- For country‑specific plans, see Esim United States, Esim France, Esim Italy, and Esim Spain. Plan pages include any APN notes unique to that destination.
For teams and partners
Setting up dozens of devices for a trip or event? Our business team can pre‑stage eSIMs and provide APN guidance per route and device fleet.
- Explore solutions For Business.
- Existing resellers and travel partners can access technical collateral in the Partner Hub.
FAQ: APN settings for eSIM
1) What APN should I use with my Simology eSIM? - Use the APN shown during activation or in your confirmation email/portal. If none is shown, your device should auto‑provision it.
2) I can’t see the APN menu on iPhone. What now? - Some carriers lock APN edits on iOS. Update carrier settings (Settings > General > About), restart, or re‑install the eSIM. If it’s still hidden, the APN is managed automatically.
3) Do I need MMS settings for a data‑only eSIM? - No. MMS fields (MMSC, proxy, port) are not required for data‑only plans. Only set them if your plan explicitly includes MMS.
4) Should APN type include “dun” for hotspot? - Usually no. Start with default,supl. Add dun only if your provider instructs you and tethering fails.
5) IPv4 or IPv6? - Choose IPv4/IPv6 (dual‑stack) where possible. If you encounter connectivity issues with certain apps, try IPv4 only on Android.
6) Will changing APN affect my primary (home) SIM? - No, APNs are set per SIM profile. Just be sure you’re editing the eSIM line used for travel.
Next step: Choose your destination and get the right eSIM with clear APN guidance on the plan page. Start at Destinations.