You turn on your phone after landing, wait for a signal, and in the corner of the screen appears a cold "No service." Before thinking your eSIM is broken, take a breath: in 90% of cases, it's a misplaced setting that can be fixed in a minute. An installed eSIM with no service is almost never a chip failure, but rather a phone configuration issue. In this guide, we'll review, in order, what to adjust to regain coverage without calling anyone.
What "No service" means with an eSIM
"No service" means your phone isn't connected to any antenna. With a travel eSIM, this often happens because the phone is still looking for your home carrier instead of the local network, because roaming is turned off, or because the eSIM isn't marked as the active line. It's not that the virtual chip is defective: it's that the phone doesn't yet know it should use it.
The difference from a physical SIM is subtle but important. With an eSIM, two or more profiles coexist on the same phone, so you have to tell it which one to use for data and which for calls. If you leave that division incomplete, the result is a screen with zero coverage even if the plan is perfectly active. That's why it's best to rule out causes from most common to least common, without deleting anything at first. If you've just installed it and still no data appears despite the eSIM being installed, start with the basics before suspecting the provider.
Quick 30-second checks
Before touching any menus, do this: activate and deactivate airplane mode for ten seconds to force a new network search, check that you are not in permanent airplane mode, and confirm that you have at least one bar of coverage somewhere on the screen.
If that's not enough, follow this list in order. Each step takes seconds and resolves most cases without needing to reinstall anything:
- Restart your phone completely, not just lock and unlock. A clean restart re-registers the line with the network.
- Verify that the eSIM is turned on in Settings: a profile can become "deactivated" without you realizing it when switching phones.
- Check the plan's start date. Many plans activate upon first use at the destination; if you haven't arrived yet, there will be no coverage.
- Check the phone's local time. An incorrect clock can prevent network registration.
Traveler tip: always perform these checks with airport Wi-Fi available. That way, if you need to reinstall the eSIM or check email for a QR code, you won't be relying precisely on the connection you're missing.
Activate the eSIM as the data line
This is the number one mistake. Your phone can have both your home SIM and your travel eSIM simultaneously, but only one carries mobile data. If you left your home line selected, the phone tries to connect to your Spanish carrier abroad and shows "No service" or charges extremely expensive roaming fees.
On iPhone, go to Settings > Mobile Data and choose your travel eSIM under "Mobile Data." Disable "Allow Mobile Data Switching" so it doesn't automatically switch to your home SIM. On Android, the path is Settings > Connections > SIM Manager, where you assign the eSIM as the preferred data line. Choosing the correct eSIM as the data line resolves most "No service" alerts. If the alert persists only when you change countries within the same trip, the problem is likely with data roaming, which we'll discuss next. And if the phone doesn't even show the profile in the menu, check why the eSIM doesn't appear in settings before proceeding.
Roaming and data roaming
A travel eSIM works by connecting to local networks in the country you're visiting, and for that, it needs to have data roaming turned on. It sounds contradictory — "roaming, if I bought the eSIM not to pay for roaming?" — but it's normal: you don't pay abusive roaming fees because your plan already includes that data; the phone just needs technical permission to connect to the local antenna.
On iPhone: Settings > Mobile Data > [your eSIM] > Data Roaming: On. On Android, look for "Data Roaming" within the eSIM settings and turn it on. It's a per-line toggle, so make sure to activate it on your travel eSIM and not on your home SIM. If you've never touched this setting, our guide on how to activate roaming and data roaming explains it step-by-step with screenshots. With data roaming on, your phone stops searching for your Spanish network and starts registering with the local carrier in a matter of seconds.
| Symptom | Common cause | Solution |
|---|---|---|
| "No service" right after landing | Data line set to home SIM | Change mobile data to eSIM |
| Coverage but no internet | Data roaming off | Activate data roaming on eSIM |
| "No service" when changing countries | Previous network still selected | Manually search for networks |
| No profile visible | eSIM deactivated or incorrectly installed | Reactivate or reinstall the profile |
Manual network selection
When your phone is "thinking" and can't find a network, forcing a manual search usually unblocks it. By default, selection is automatic, but upon landing in a new country, the phone sometimes clings to a weak or incompatible network. Manually choosing the carrier forces it to register with the one offering the best coverage.
The path is Settings > Mobile Data > Network Selection (or "Network Operators" on Android). Deactivate the "Automatic" option, wait for the list of available operators to appear, and choose one of the main ones in the country. If the first one doesn't connect, try another: almost all eSIM plans have agreements with several local networks. This trick is especially useful in border areas or on train journeys where the phone jumps between countries. If after trying two or three networks you still can't get the eSIM to connect abroad, it's time to check the plan status. You can delve deeper into what to do when the eSIM doesn't connect abroad with more specific scenarios.
When it is a plan issue
If you've reached this point and still have no coverage, it's time to rule out that the problem is with the plan itself, not the phone. Check three things: that the plan is within its validity period, that you have remaining data balance, and that you are in a country covered by that specific plan (a "Europe" plan, for example, won't work in Morocco).
The quickest way to check is to log into your provider account from Wi-Fi and check the plan status and remaining data. If the plan expired or you ran out of gigabytes, you'll see zero data even if your phone shows coverage: in that case, simply top up. With a PuraSim eSIM, you have 24/7 Spanish-language support, so if none of the above works, a message to the team usually resolves it without you having to reinstall anything. When the phone is properly configured and there's still no data, the fault is almost always with the plan's validity or balance. For a broader overview of typical problems, check out the common eSIM problems and their solutions, and if you're wondering if airplane mode is playing tricks on you, see how the eSIM works with airplane mode activated.
Frequently asked questions
Why does my eSIM say "No service" if I just installed it?
The most common reasons are that you haven't marked it as the data line or that roaming is turned off. It's also possible that the plan activates upon arrival at your destination, so you won't have coverage until you reach the country. Check these three points first before reinstalling anything.
Do I need to activate roaming with a travel eSIM?
Yes, data roaming must be enabled on the eSIM. You won't be charged roaming fees because the data is already included in your plan; that switch merely gives the phone technical permission to connect to the local network in the country you're visiting.
Does "No service" mean my eSIM is broken?
Almost never. An eSIM doesn't "break" like a physical SIM; it's a digital profile. The alert is usually due to a setting (data line, roaming, or selected network). If after checking everything it's still the same, contact your provider's support before giving up on it.
What do I do if I have coverage but no internet?
This indicates that data roaming is off or that the data line is set to your home SIM. Go into the eSIM's mobile data settings, activate data roaming, and confirm it's the preferred data line. This usually resolves the issue in seconds.
Does restarting the phone help restore service?
Often, yes. A full restart re-registers the line with the network and clears intermediate states that leave the phone "stuck" without a signal. It's one of the first steps to try, along with toggling airplane mode on and off.
Conclusion
"No service" scares more than it should: in the vast majority of cases, it's fixed by choosing the eSIM as the data line, enabling roaming, and forcing network selection. Only if the plan has expired or run out of data will you need to top up. With the correct configuration, regaining connection is a matter of a minute. If you're looking for a reliable eSIM with Spanish support for your next trip, check out all PuraSim eSIM plans and travel with the peace of mind of having internet from the moment you land.
