Travel eSIM not working abroad? 10 fixes, in the right order

The 60-second checklist

Before changing anything else, check these five points. Together they fix the large majority of “no internet” cases on arrival:

• The travel eSIM line is switched on.
• Data roaming is on for the travel eSIM (and off for your home SIM).
• The travel eSIM is selected for mobile data.
• Airplane mode has been switched on and off once since landing.
• Your plan covers this country and is still valid.

Still nothing? Find your symptom below, then go through the numbered fixes.

What exactly is not working?

The phone usually tells you where the problem is. Match what you see to the most likely cause:

Fixes 1 to 4: the phone settings

1. Turn on data roaming for the travel eSIM

A travel eSIM is a roaming SIM by design: it connects through partner networks in the country you visit. If data roaming is off for that line, the phone shows signal but loads nothing. Turning it on does not cost extra; you only pay for the plan you bought. Keep data roaming off on your home SIM, so your own carrier cannot charge roaming fees.

2. Choose the travel eSIM for mobile data

With two lines in the phone, only one carries mobile data. If it is still set to your home SIM, the travel eSIM sits idle. On iPhone, also switch off Allow Cellular Data Switching, which can push data back to the home SIM when the travel line is briefly weak. It also helps to give both lines clear names, such as “Home” and “Travel”, in the cellular settings, so you always pick the right one.

3. Check that the line is switched on

Installed is not the same as active. Open the eSIM line in your settings and make sure Turn On This Line (iPhone) or the SIM toggle (Android) is on.

4. Toggle airplane mode or restart

After a long flight the phone may still be holding on to the last network it saw. Airplane mode on for ten seconds and off again makes it search afresh; a full restart does the same more thoroughly. Give it a minute or two after landing: the first registration on a foreign network can take a moment.

Fixes 5 to 7: network selection, network mode and APN

5. Select a network manually

Automatic network selection sometimes picks a network your plan has no agreement with. Switch automatic selection off, wait for the list of available networks, and choose one of the partner networks named in your plan details. If one does not work, try the next. Plan pages on our destination comparisons list the networks each plan uses.

6. Change the network mode

Some partner networks only give roaming customers 4G, or a 5G cell is congested. If the connection keeps dropping or crawls, set the line to LTE/4G instead of 5G for a while. You give up little speed and often gain stability.

7. Enter the APN, if your provider requires it

Most travel eSIMs configure the access point name (APN) automatically. A few ask you to enter it by hand, and without it you get signal but no internet. The correct value is in the installation email or the provider’s app; type it exactly, then restart. Do not invent an APN or copy one from another provider.

Fixes 8 to 10: the plan and the phone

8. Check that the plan covers this country and is still valid

Regional plans do not always include every country you might expect, and some exclude a neighbour or an overseas territory. Check the country list, the remaining data and the end date in the provider’s app or website. If you have used up the allowance or the validity ran out, a top-up or a new plan is the fix. For unlimited plans, a slow connection may simply mean the daily full-speed allowance is used up until the next day.

9. Make sure the phone is unlocked and the eSIM is fully installed

A carrier-locked phone can install a foreign eSIM and still refuse to connect. Our guide How to check if your phone supports eSIM shows how to check the lock in a minute. If the installation was interrupted, the line may appear without working; in that case contact the provider rather than installing again.

10. Contact the provider’s support, with the right details

If nothing above helps, the provider can check the line from their side. Have these ready: the order number, the eSIM’s ICCID (in the line’s settings), your phone model, the country and network you are trying, and a screenshot of the error. Use hotel or café Wi-Fi for the chat.

Where the settings are on iPhone and Android

Menu names vary a little by software version and language, but the paths below are a reliable starting point:

On Samsung phones with two SIMs, select the travel SIM first where the menu asks which SIM a setting applies to.

How to avoid problems on your next trip

• Install at home, on Wi-Fi. The installation needs a connection; doing it before you fly means only switching it on at arrival.
• Update the phone before you leave. Carrier and eSIM fixes often arrive with system updates, and installing a large update over hotel Wi-Fi is no fun.
• Read the activation rule. Most plans start counting at the first connection abroad, some at installation. Plan the timing accordingly.
• Save the plan details offline. A screenshot of the APN (if any), the partner networks and the support contact is worth having before you lose Wi-Fi.
• Check the country list against your route, especially for regional plans and island or overseas territories.
• Pick a plan with more than one partner network if you travel outside the big cities. Our guides for Japan and Thailand show how much this matters in practice.

Ready to compare plans for your next trip? Start from our destination list; every plan shows its networks, validity and price per GB.