eSIM Not Working? Travel eSIM Troubleshooting Checklist
A practical checklist for fixing travel eSIM activation failures, no data, QR code issues, APN problems, roaming settings, and wrong data-line selection.
Quick answer
Most travel eSIM problems are settings problems, not provider problems. Check that the eSIM is installed, turned on, assigned as the mobile data line, and allowed to use data roaming when the provider requires it — then restart the phone. If you deleted the eSIM profile, contact the provider before trying anything else, because many travel eSIM profiles cannot be reinstalled from the same QR code.
Start with the simple checks
Most travel eSIM problems are settings problems. Before blaming the provider, check whether the eSIM is installed, turned on, assigned as the mobile data line, and allowed to use roaming when the provider requires it.
If you have not bought a plan yet, this guide also shows what to check before checkout. A few minutes of preparation can prevent most arrival-day stress.
Problem: the eSIM installed, but there is no data
Open cellular settings and confirm that mobile data is assigned to the travel eSIM. Many phones keep data on the primary SIM after installation. If the home SIM is still selected, the travel eSIM may sit idle.
Next, turn on data roaming for the travel eSIM. This sounds wrong to many travelers, but travel eSIMs often use roaming agreements with local networks. If the provider says roaming must be enabled, leave it on for that eSIM and keep expensive roaming disabled on your home SIM.
Restart the phone after changing these settings. A restart forces the device to reconnect to the available networks. If data still refuses to start, work through the deeper checklist in eSIM installed but no data.
Problem: the QR code will not scan
Increase screen brightness on the device showing the QR code, clean the camera lens, and make sure the full code is visible. If the QR was sent by email, open it on another screen or print it.
If scanning still fails, look for manual installation details from the provider. Many providers include an SM-DP address and activation code. The eSIM QR code not working guide covers these steps in more detail.
Do not scan the same QR repeatedly on different devices. Some eSIM QR codes are single-use.
Problem: the eSIM disappeared or was deleted
If you deleted the eSIM profile, contact the provider before trying random fixes. Many travel eSIM profiles cannot be reinstalled from the same QR code. Some providers can issue a replacement, but not all will.
This is why eSIMAdvice recommends leaving the installed profile in place until the trip is fully finished.
Problem: wrong network or weak signal
Set network selection to automatic first. If the phone connects to a weak partner network, try manual network selection and test the provider-supported networks listed in the plan notes.
In rural areas, islands, trains, mountains, or underground stations, weak signal may be a normal coverage issue. Compare country pages such as United Kingdom eSIM plans or Thailand eSIM plans for network notes before buying, or test expected networks with the coverage checker.
Problem: hotspot does not work
Not every travel eSIM allows tethering. If hotspot is important for a laptop or family sharing, filter for hotspot before checkout. If the plan says hotspot is allowed but it still fails, restart the phone and check APN instructions from the provider.
What to send support
If you contact provider support, include:
- phone model,
- destination country,
- plan name,
- order number,
- screenshot of cellular settings,
- screenshot of any error,
- whether roaming is enabled,
- local network currently selected.
Clear information gets faster support than saying the eSIM does not work.
Prevent this next time
Before your next trip, check compatibility, install on WiFi, save provider instructions, confirm activation timing, and keep a backup plan. Arrival-day failures have their own patterns, covered in why eSIMs fail after landing. Start with How to install a travel eSIM, then compare active plans in the country directory.
FAQ
Why is there no data after installing my eSIM?
Usually because mobile data is still assigned to your home SIM. Assign mobile data to the travel eSIM, enable data roaming if the provider requires it, and restart the phone.
Should data roaming be turned on for a travel eSIM?
Often yes — travel eSIMs frequently connect through roaming agreements with local networks. Enable roaming for the travel eSIM only, and keep it disabled on your home SIM to avoid expensive charges.
Can I reinstall a deleted eSIM?
Often not from the same QR code — many travel eSIM profiles cannot be reinstalled once deleted. Contact the provider before trying anything else; some can issue a replacement, but not all will.
Why won't the eSIM QR code scan?
Low screen brightness, a dirty camera lens, or a partially visible code are the usual causes. If scanning keeps failing, use the manual installation details (SM-DP address and activation code) from the provider.
Why does hotspot not work on my travel eSIM?
Not every travel eSIM allows tethering, so check the plan terms first. If hotspot is allowed but failing, restart the phone and apply the provider's APN instructions.