Troubleshooting
eSIM installed but no data? Fix it in three checks
Nine times out of ten it's one of these three settings. Two minutes, tops.
Installed fine, but nothing loads? Work through these in order — the first two fix almost every case.
1. Is data roaming ON for the eSIM?
This is the big one. Travel eSIMs need data roaming on — it doesn't cost extra, your data is already paid for.
- iPhone: Settings → Mobile Service → tap your FullBars eSIM → Data Roaming → ON
- Android: Settings → Connections/Network → SIM manager → FullBars eSIM → Data roaming → ON
2. Is mobile data set to the eSIM?
Your phone can only use one line for data at a time — make sure it's the right one.
- iPhone: Settings → Mobile Service → Mobile Data → select your FullBars eSIM
- Android: SIM manager / SIMs → Mobile data → select your FullBars eSIM
3. Restart your phone
Genuinely. After changing SIM settings, a restart forces the phone to re-register on the local network. It fixes more than it has any right to.
Still nothing?
- Toggle Airplane mode on for 10 seconds, then off.
- Try selecting a network manually: in the eSIM's settings, turn off automatic network selection and pick one from the list.
- Check you've still got data left in your account.
If none of that works, email help@fullbars.co.uk with your order number and phone model — we'll dig in.