eSIM Not Working? Travel eSIM Troubleshooting Checklist

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.

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.

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.

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. Start with How to install a travel eSIM, then compare active plans in the country directory.