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Most connection issues come down to one of five settings. Work through them in order — each takes seconds.
Don’t delete the eSIM, no matter what. A deleted eSIM can’t be reinstalled, but a “not working” one can almost always be fixed in chat.
1

Turn on Data Roaming

Settings → Cellular/Mobile → your eSIM line → Data Roaming → ON. This is the #1 cause of “no internet” — travel eSIMs need roaming enabled to connect.
eSIM line settings with Turn On This Line and Data Roaming enabled
2

Set the eSIM as your mobile data line

In Settings → Cellular/Mobile → Mobile Data, make sure your Fizen eSIM is selected — not your home SIM.
3

Toggle Airplane Mode

Turn Airplane Mode on, wait 30 seconds, turn it off. This forces your phone to re-register on the local network. A full restart works too.
4

Select a network manually

In Settings → Cellular/Mobile → your eSIM line → Network Selection, switch off Automatic and pick a supported carrier from the list. If one carrier fails, try another.
5

Check your data balance

Open Fizen App → eSIM → My eSIMs to confirm your plan is active and has data left. If the plan is used up, buy a new plan in a few taps (it comes as a new eSIM to install). See Check Your Data Balance.

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Still not connected?

Contact support — covered by the 1:1 Trip Guarantee

Tap the chat icon in the Fizen App. A human agent will assist you as soon as possible — and if the fault is on our side, replace your eSIM free of charge or refund you under the guarantee.

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