Check these settings in order
- Make sure you are inside the plan’s included coverage. A fixed-data plan needs both remaining data and remaining validity; an unlimited plan needs remaining validity.
- Turn on the travel eSIM line and select it for mobile data.
- Enable data roaming on the travel line. Keep your regular line’s roaming off if needed.
- Turn off automatic mobile data switching.
- Toggle airplane mode briefly, then restart the phone if needed. Allow time for network registration.
- If there are signal bars but no internet, check the APN shown in your private installation details.
- Temporarily disable a VPN to test whether it is affecting the connection.
Do not delete the eSIM. If it still fails, send support your destination, device model, displayed network and exact error. A screenshot of SIM settings can help if private installation codes are hidden.