eSIM Keeps Disconnecting or Dropping Signal?

Lock your phone to a specific carrier manually

Automatic carrier selection causes disconnections when the phone switches between partner carriers. iOS: Settings → Cellular → Network Selection → Automatic off → select the strongest carrier. Android: Settings → Network → SIM → Network Operators → select manually.

Set preferred network mode to LTE/4G

If your phone is trying to use 5G and failing, it falls back through 4G, 3G, and 2G repeatedly. iOS: Settings → Cellular → tap eSIM → Voice & Data → LTE. Android: Settings → Network → Preferred Network Type → LTE/4G only.

Disable Wi-Fi Calling if enabled

Wi-Fi calling can interfere with eSIM data stability in some configurations. Settings → Cellular → tap eSIM → Wi-Fi Calling → Off. Test data stability after disabling.

Check for physical SIM interference

If a physical SIM and eSIM are both active, your phone may switch data between them unexpectedly. Try disabling the physical SIM temporarily (Settings → Cellular → physical SIM line → Turn Off Line) to confirm the eSIM works stably on its own.

Restart and toggle airplane mode on arrival

After moving to a new area or country, toggle airplane mode on for 30 seconds and off again. This clears stale carrier registrations that cause repeated disconnections.

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 does my eSIM work for a few minutes then disconnect?

This pattern usually means automatic carrier switching — your phone keeps trying different carriers and losing registration during the switch. Locking to a single carrier manually is the fastest fix.

My eSIM drops in certain locations only. Is this coverage?

If drops are location-specific (underground, rural areas, buildings), it is coverage-related and not an eSIM issue. If drops happen everywhere, it is a settings or carrier switching issue. Smart Coach can run a diagnostic to determine which.