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No Service on the Roamly line at your destination almost always means the phone isn’t allowed to use the local network yet, or is trying the wrong one. Check these in order.
1

Is the line actually on?

  • iPhone: Settings → Mobile → your Roamly line → Turn on this Line must be on.
  • Android: Settings → Network & internet → SIMs → your Roamly SIM → Use this SIM on. (Samsung: Settings → Connections → SIM manager.)
2

Is Data Roaming on for that line?

Without it the phone won’t register on a foreign network at all, and shows No Service.
  • iPhone: your Roamly line → Data Roaming on.
  • Android: your Roamly SIM → Roaming on. (Samsung: Settings → Connections → Mobile networks → Data roaming.)
It costs nothing extra on the Roamly line. See Data roaming: why it must be on.
3

Is network selection set to Automatic?

If you (or the phone) picked a network manually somewhere along the way, it may be one your plan can’t use.
  • iPhone: your Roamly line → Network Selection → Automatic on.
  • Android: your Roamly SIM → Automatically select network on. (Samsung: Settings → Connections → Mobile networks → Network operators → Select automatically.)
Then flick Airplane Mode on and off. If Automatic keeps landing on a network that won’t connect, do the reverse and choose one from your plan’s list by hand.
4

Restart the phone

A restart forces a fresh network search. Give it a minute after it comes back.

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If it’s still No Service

  • Check the plan covers this country. Your plan page shows the countries. A Japan plan won’t connect in Korea.
  • Check the plan hasn’t expired or run out. Also on the plan page. See What happens when my plan expires?
  • Check coverage. Rural areas, islands and some borders have patchy or no coverage for any network. Try again in a town.
  • Is the phone carrier-locked? A locked phone can sometimes install an eSIM but never connect with it. See Does my phone support eSIM?
Then contact us with your phone model, the country you’re in and a screenshot of the Roamly line’s settings.

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Still at home?

No Service before your trip is normal. See My eSIM says “No Service” and I haven’t left yet.