eSIM Stopped Working After a Software Update?

Re-enable data roaming on your eSIM line

OS updates frequently reset data roaming per-line. This is the #1 cause of post-update eSIM failure. iOS: Settings → Cellular → tap eSIM line → Data Roaming on. Android: Settings → Network & Internet → SIMs → tap eSIM → Data Roaming on.

Verify your eSIM is still set as the active data SIM

Updates can reset the preferred data SIM to your home physical SIM. iOS: Settings → Cellular → Cellular Data. Android: Settings → Network → SIM Manager → Data SIM. Reselect your eSIM.

Restart your device after the update

If you installed the update and jumped straight to using data, a restart helps the modem firmware fully initialize. Hold power → restart → wait 2 full minutes before testing.

Reset network settings if issues persist

Some updates corrupt stored APN or network credentials. A network settings reset (not a factory reset) clears these cleanly. iOS: Settings → General → Reset → Reset Network Settings. Android: Settings → System → Reset → Reset Wi-Fi, Mobile & Bluetooth.

Use Smart Coach for automatic diagnosis

Open LTE.app and tap Smart Coach. It checks your APN settings, roaming state, and carrier connection automatically — even without mobile data — and walks you through the exact fix for your device and carrier.

Why do phone updates break eSIM settings?

OS updates migrate user settings between versions, but per-SIM preferences like data roaming are stored differently across OS versions and sometimes fail to migrate correctly. This is a known issue on both iOS and Android across major version updates.

My eSIM profile disappeared after an update. What do I do?

Rarely, eSIM profiles are removed during updates. If your eSIM line no longer appears in Settings → Cellular, contact your provider for a new QR code. LTE.app can reissue QR codes for any active plan.