eSIM Not Working Abroad? A Step-by-Step Fix Checklist

If your travel eSIM will not connect abroad, three causes explain the large majority of cases: data roaming is switched off for the eSIM line, your phone is still using your home SIM for mobile data, or the plan has not started yet. Work through the checks below in order and you will usually be online within a few minutes — no reinstalling, no panic, and no expensive call to your home network.

This is the checklist we would run ourselves, from the fastest fixes to the things worth checking only if the quick ones fail.

First, the 30-second checks

Before changing any settings, confirm the basics. Most "dead" eSIMs are simply not switched on, or the phone is quietly routing data through the wrong line. Match your symptom to the likely cause and jump to the fix that fits.

Symptom	Most likely cause	Jump to fix
"No Service" or no signal bars	eSIM off, or not registered yet	Turn data roaming on
Bars show, but no data / pages won't load	Wrong line selected for mobile data	Turn data roaming on
Connected briefly, then dropped	Needs a manual network	Select the network manually
Data works on some apps, not others	Missing or wrong APN	Check the APN
Was fine yesterday, dead today	Plan expired or data used up	Restart and re-check

Three things to verify in the first half-minute:

• The eSIM is installed and turned on. In your SIM or mobile-plan settings, the travel eSIM should be listed and its line switched on — not greyed out or paused.
• The correct line is selected for Mobile Data. A dual-SIM phone lets you pick which line carries data. It must be set to the travel eSIM, not your home SIM.
• Cycle aeroplane mode. Turn aeroplane mode on, wait about ten seconds, then turn it off. This forces a fresh network search and clears a surprising number of first-connection hiccups.

New to installing eSIMs, or want to double-check the profile went on correctly? Our step-by-step guides for iPhone and Android walk through every screen.

Turn data roaming ON for your travel eSIM

This is the fix that catches most travellers out, because it feels wrong. A travel eSIM connects to networks in your destination as a roaming profile — that is how it reaches local coverage without you holding a local contract. So Data Roaming has to be for the travel eSIM line, or the phone refuses to use it for data.