eSIM Not Working? Quick Fixes for iPhone & Android Travelers

Signal but no internet

This is almost always the Data Roaming toggle for the eSIM line:

• iPhone: Settings → Cellular → tap the travel eSIM → enable Data Roaming.
• Android: Settings → Network & internet (or Connections) → SIM manager → select the eSIM → turn on Roaming or Data roaming.

Only enable roaming on the travel eSIM; leave it off on your home SIM to avoid unexpected charges. For more on keeping lines separate, see Dual SIM travel tips (dual‑sim esim travel tips).

If you see the LTE/5G icon but pages won’t load, toggle the eSIM line off and back on in the same menu. This forces the device to renegotiate the data session with the carrier’s gateway.

Slow speeds

• Confirm the plan matches the country you’re in – a mismatched plan can fall back to weaker partner coverage.
• Toggle Airplane Mode or restart once to force a fresh network attach.
• Busy areas like stadiums, transit hubs, or city centers can get congested at peak times on any network.
• Check whether cloud backups or app updates are running in the background and using bandwidth.

When you notice a dip in speed, try switching to a less‑crowded frequency band if your phone shows it (some Android devices display “LTE Band 3” vs “Band 7”). Moving away from large crowds or stepping outside a congested venue often restores normal throughput.

Still using home data instead of the eSIM

• iPhone: Settings → Cellular → turn off Allow Cellular Data Switching, which can silently revert data to your home line.
• Android: Open SIM manager and set the preferred SIM for Mobile data to the eSIM; some phones default back to the physical SIM after a restart.

A useful habit is to check the Cellular/Mobile data screen each morning after you power on the device. A quick glance prevents accidental data drain on your primary plan, especially when you’re hopping between countries with different eSIM profiles.

When to contact support

Email [email protected] with your order number if:

• The QR code was never used but still fails to install after several Wi‑Fi attempts.
• Your plan shows active in the dashboard yet you get no signal in a covered city.
• You need a new profile after switching devices.

Never share your QR code publicly or send your account password – support will never ask for it.

FAQ

Why does my eSIM work in one city but not another?

Coverage depends on partner networks that vary by location. Weak signal in a rural area or specific building is a network limitation, not a broken eSIM – download offline maps as a backup.

I restarted my phone and now data is on my home SIM. Why?

Some phones reset preferred‑data settings after a restart, or “smart” dual‑SIM features switch back to the physical line. Manually re‑select the travel eSIM for Cellular/Mobile data each time this happens.

Can I reinstall an eSIM that failed halfway through?

Usually yes, once you’re on stable Wi‑Fi – most failed installs just need a retry. If the profile appears as already used, contact support for a reissue.

Does deleting and reinstalling fix most issues?

Rarely necessary. Toggling Airplane Mode and checking Cellular Data / Data Roaming settings resolves the majority of cases without reinstalling anything.

What should I do if I see “No Service” after crossing a border?

First, confirm that your eSIM plan includes the new country. If it does, turn Airplane Mode on for 15 seconds, then off, and reselect the eSIM for data. If the problem persists, check that the device’s carrier settings are up to date (Settings → General → About on iPhone; Settings → System → Advanced → Carrier on Android).

Is it safe to keep both SIMs active for calls and texts while using the eSIM for data?

Yes. Most modern smartphones allow you to assign the home SIM for voice and SMS while the eSIM handles data. Verify the default voice line in Cellular settings to avoid unexpected charges on your primary plan.

How can I reduce battery drain when using an eSIM abroad?

Disable background app refresh for non‑essential apps, lower screen brightness, and use Wi‑Fi whenever available. Some devices also offer a “Low Data Mode” that limits background syncing, which can extend battery life while still keeping essential services online.

Next steps

• Verify your device works with eSIM: eSIM compatibility check
• Learn how to keep your lines organized: Dual SIM travel tips
• Browse more help: FAQ
• Need help? Email [email protected]

Stay connected – check your eSIM coverage for Japan, USA, Europe, UK or Germany at destinations and follow the installation guide for your device.

Worth booking – skip the line at top attractions like the Eiffel Tower in Paris, the Colosseum in Rome, Sagrada Família in Barcelona, or the museums of London and grab tickets via tickets.