Bought an eSIM but It Won’t Connect? Here’s Why and What to Do
Key takeaways
An installed eSIM does not always connect straight away. A plan for another country may only start working after you arrive.
Select the travel eSIM for mobile data in your phone’s settings. Some plans also need data roaming switched on.
An LTE or 5G icon does not mean your internet connection is working. If you have a signal but no data, the problem may involve settings, activation or the plan itself.
Do not delete the eSIM to reinstall it: the QR code may only allow one installation.
If your settings match the instructions but you still cannot connect, support will need your order number, phone model and a description of what you see on screen.
You step off the plane, turn off airplane mode and open your map. It will not load. The eSIM is in your settings, the plan is paid for and you have data left. Meanwhile, your driver is asking which exit to pick you up from.
It is tempting to toggle every setting or delete the eSIM and start again. First, though, work out what is happening: is the eSIM missing from the phone, is it unable to find a network, or does it show a signal without internet access? Each points to a different place to look.
You installed the eSIM at home, but it has no signal
A plan for Japan does not necessarily connect while you are still at home or changing planes in another country. Installation adds the eSIM profile to your phone. It connects where the purchased plan provides coverage.
Having no signal before departure does not mean something is broken. If the eSIM appears in your settings, it has been installed. What happens next depends on that plan’s activation terms.
A travel eSIM’s validity period can start at different points: installation, manual activation or the first connection to a supported network. Check this before your trip so the plan does not run out before your vacation.
Plans in the Revosim travel eSIM catalog have different coverage, validity periods and activation terms. For many plans, the countdown starts with the first connection in the destination country, but follow the terms of the plan you choose.
You have arrived, but your phone is still using your primary SIM
Installing a new plan does not always make your phone switch to it for internet access. The travel eSIM may be switched on while your home SIM is still selected for mobile data.
This is easy to miss: two carrier names appear, there is a signal, but the browser will not load. Your purchased eSIM should be selected in the mobile data settings.
If you have kept plans from previous trips, give them clear names such as “Japan, October” rather than leaving several profiles with the same “Secondary” label. That makes it easier to avoid switching on an old profile.
Data roaming is another setting that can seem counterintuitive. Some travel eSIMs need data roaming switched on because they use a partner network. This applies to the travel eSIM. Your primary SIM’s settings are separate. The plan’s instructions tell you which way to set the switch.
Turning off all roaming before a flight out of habit can leave you without internet access.
You have a signal and an LTE icon, but nothing loads
Full signal bars look reassuring. Once your phone has found a carrier, you expect the internet to work too. But connecting to a mobile network and transferring data are separate things.
One possible cause is the APN, or access point name. Your phone usually receives it automatically. For some plans, you need to enter the value manually using your provider’s instructions.
Do not copy an APN from a random comment. Someone with the same phone model visiting the same country may have a plan that uses different settings. Use the value supplied for your own eSIM.
Check the plan itself too. The purchase may appear in your account, but its validity period could have started earlier, the data may have run out, or your current country may be outside its coverage. This is easy to overlook during a layover: a plan for your vacation destination does not necessarily cover the airport you pass through on the way.
Turn off Wi-Fi briefly when testing mobile data. Otherwise, a page loading tells you nothing about the eSIM: your phone may have opened it over the airport’s network.
Your phone says “No service”
After a flight, your phone may need to register on the network again. Switching airplane mode on for around 30 seconds and then off lets it start searching again. If nothing changes, try restarting the phone. Apple also includes this step in its roaming troubleshooting recommendations.
In an underground car park or deep inside a terminal, coverage may be the issue. Before changing settings, check for a signal near an exit or outside.
If automatic network selection does not work, your plan’s instructions may list supported carriers you can select manually. The network with the strongest signal is not necessarily one your eSIM can use.
Sometimes the situation is different: the internet worked yesterday, then stopped on two phones with similar plans at the same time. That calls for a check on the provider’s side. Coverage, service status and network outages are among the issues you cannot fix in your phone’s settings.
What if the eSIM never appeared on your phone?
If no new profile appears in your settings after scanning the QR code, you have not reached the mobile network connection stage yet.
Downloading the profile needs an internet connection, usually Wi-Fi. If the airport network only opens a sign-in page, installation may stall. If you have manual setup details, you can add the eSIM without scanning the QR code.
Check your exact phone model, including its regional version, and whether it is locked to a carrier. The same model name does not always mean the same eSIM support. These requirements apply to Revosim plans too.
Save any “code already used” message for support. Scanning again will not resolve an issue with a single-use code.
Why you should not delete the eSIM and start again
It is a familiar fix for apps: delete, download again and sign in. An eSIM does not always work that way.
Some QR codes allow only one installation. If you delete the profile, the same code will not add it back. You then have to restore the eSIM as well as solve the original internet problem.
Apple recommends not deleting an eSIM while troubleshooting unless your provider tells you to.
Switching an eSIM off in your settings is also different from deleting it. A switched-off profile stays on your phone, ready to be turned on again.
What to tell support
“My internet does not work” leaves support with too many unknowns. You can get through the initial questions faster by explaining exactly where things have stopped. For example:
“My eSIM is installed on an iPhone 15. I am currently in Rome. The profile is switched on and selected for mobile data, and data roaming is enabled as instructed. The phone shows LTE, but websites do not load with Wi-Fi switched off. Restarting made no difference. My order number is [order number].”
You can attach screenshots showing the SIM selected for mobile data, the roaming settings and any error. Do not post the installation QR code in a public chat: it contains access details for the profile.
If you bought the plan from Revosim, include your current country and the exact plan name too. Support can use your order number to check the service status.
After a long flight, troubleshooting APN settings is probably the last thing you want to do. Keep the first check to a few familiar details: the right country, the right eSIM selected for data and the settings from its instructions. If everything matches, contact support. You do not have to buy a second plan and delete the first in the hope of better luck. There is still time for your phone to be a map, translator and camera, and your vacation evening should not disappear into its settings.