In short: An eSIM "No Service" notification is almost always due to a mobile setting, not a chip malfunction: improperly selected data line, roaming turned off, or a network not manually searched for. By checking these three points in order, you can regain coverage in under a minute, without reinstalling anything or calling support.
You turn on your phone after landing, wait for the signal, and a cold "No Service" appears in the corner of the screen. Before you think your eSIM is broken, breathe: in the vast majority 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 mobile configuration issue. In this guide, we'll review, in order, what to do to get coverage back without calling anyone.
What "No Service" means with an eSIM
"No service" means your mobile phone is not connected to any antenna. With a travel eSIM, this usually happens because the phone is still looking for your home operator instead of the local network, because roaming is turned off, or because the eSIM is not marked as an active line. It's not that the virtual chip is defective: it's that the phone doesn't yet know it should be using 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've never used a virtual eSIM and want to understand exactly what it is before diagnosing the fault, that guide explains it without technical jargon. If you leave that distribution incomplete, the result is a screen with zero coverage even if the plan is perfectly active. That's why it's advisable to rule out causes from the most common to the least common, without deleting anything at the outset. If you've just installed it and no data appears despite having the eSIM installed, start with the basics before suspecting the provider.
Quick 30-second checks
Before you dive into menus, do this: activate and deactivate airplane mode for ten seconds to force a new network search, check that you're 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 on 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 start date. Many plans are activated upon first use at the destination; if you haven't arrived yet, there will be no coverage.
- Check the local time on your mobile. A misaligned clock can prevent network registration.
Traveler's tip: always perform these checks with airport Wi-Fi available. That way, if you need to reinstall the eSIM or check your email for the QR code, you won't rely on the very connection you're lacking.
Activate the eSIM as a data line
This is one of the most common mistakes. Your phone can have your home SIM and travel eSIM at the same time, but only one carries mobile data. If you left your home line selected, the phone tries to connect to your Spanish operator abroad and shows "No service" or charges expensive roaming fees.
On iPhone, go to Settings > Mobile Data and choose the 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" notifications. If the notification persists only when you change countries within the same trip, the problem is likely with roaming, which we'll cover next. And if the phone doesn't even show the profile in the menu, check why the eSIM doesn't appear in the settings before proceeding.
Roaming and data roaming
A travel eSIM works by connecting to local networks in the country you visit, and for that, it needs to have data roaming turned on. It sounds contradictory—"roaming, when I bought the eSIM not to pay roaming?"—but it's normal: you don't pay abusive roaming fees because your plan already includes that data; the mobile 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 and turn it on. It's a per-line switch, so make sure to activate it on the travel eSIM and not on your home one. If you've never touched this setting, our guide on what data roaming is and how to activate it explains it step by step. With roaming on, the mobile stops looking for your Spanish network and starts registering with the local operator in a matter of seconds.
| Symptom | Common Cause | Solution |
|---|---|---|
| "No service" immediately after landing | Data line on home SIM | Change mobile data to eSIM |
| Coverage but no internet | Data roaming off | Activate roaming on eSIM |
| "No service" when changing countries | Previous network still selected | Manually search for networks |
| No visible profile | eSIM deactivated or incorrectly installed | Reactivate or reinstall profile |
Manual network selection
When the mobile is "thinking" and can't find a network, forcing a manual search often unblocks it. By default, the selection is automatic, but when landing in a new country, the phone sometimes clings to a weak or incompatible network. Manually choosing the operator forces it to register with the one that offers the best coverage.
The path is Settings > Mobile Data > Network Selection (or "Network Operators" on Android). Disable 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 mobile 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 into how to install the eSIM step by step in case the profile was corrupted during installation and it needs to be reinstalled from scratch.
When it is a plan problem
If you've made it this far and still have no coverage, it's time to rule out that the problem is with the plan itself and not with the mobile. Check three things: that the plan is within its validity period, that you have data balance left, 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 in to your provider's account from Wi-Fi and check the plan status and remaining data. If the plan has expired or the gigabytes have run out, you'll see zero data even if the mobile shows coverage: in that case, simply top up. With a PuraSim eSIM, you have 24/7 email and WhatsApp support in your language, so if none of the above works, a message to the team usually resolves it without you having to reinstall anything. When the mobile is configured correctly and there is still no data, the fault is almost always in the plan's validity or balance. To better understand the differences between this type of connectivity and other travel alternatives, take a look at our comparison between physical international chip and eSIM: it helps you decide what suits you best depending on the destination and how many lines you need to manage at once.
Common errors and what almost no one tells you about "No Service"
There's a layer of faults that almost no one explains because they're not as obvious as "activate roaming." These are the ones that truly catch travelers off guard.
Myth: any eSIM works for any country. This is not true. An eSIM Spain only covers Spanish territory; if you cross into Portugal or France with the same plan, you'll see "No Service" even if everything is configured correctly, because the plan doesn't include that network. For a route that combines several countries, a Europe eSIM is suitable, as it roams between the main networks on the continent. Before assuming your phone is faulty, first check that the plan covers the exact country you are in.
What almost no one tells you: the problem might be the physical SIM, not the eSIM. If you keep your physical SIM from Spain active at the same time as your travel eSIM, the phone sometimes prioritizes the physical SIM for "calls and SMS" on its own, and you end up with both lines fighting for the antenna. On phones with two active lines, temporarily deactivate the physical SIM (you don't need to remove it, just turn off the line in settings) during the trip; this prevents the mobile from hesitating between two networks and losing both.
VoLTE and 5G also play a role. Some mobile phones need VoLTE activated, or even to force 4G/LTE instead of 5G, to register correctly with certain eSIM-only operators. If you see "No Service" only when your mobile is on 5G, try manually lowering the preferred network type to 4G/LTE in the same menu where you chose the eSIM as your data line; on quite a few Android devices, this resolves what appeared to be a coverage issue.
Airplanes and "phantom" airplane mode. If you've just landed and have been in airplane mode during the flight, some mobile phones take up to a couple of minutes to re-register the eSIM even after you've deactivated it. This is not a fault; it's the normal reconnection time: give it some leeway before touching anything else. And once connected, if you want to get the most out of your plan, here are tips to save data with your travel eSIM.
None of these cases are virtual chip failures: they are configuration nuances that even the mobile's manual doesn't explain well. Therefore, when you have already tried the data line, roaming, and network selection and it still doesn't work, it's worth reviewing these four points before writing to support.
Frequently Asked Questions
Why does my eSIM say "No Service" if I just installed it?
Most commonly, you haven't marked it as the data line or roaming is turned off. It's also possible that the plan activates upon arrival at the destination, so you won't have coverage until you land in the country. First check these three points before reinstalling anything.
Do I need to activate roaming with a travel eSIM?
Yes, data roaming must be turned on for 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 are 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 notification 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?
That situation points to data roaming being turned off or the data line being on the home SIM. Go into the eSIM's mobile data settings, activate roaming, and confirm it's the preferred data line. This usually resolves in seconds.
Does restarting the phone help restore service?
Often, yes. A complete restart re-registers the line on the network and clears intermediate states that leave the mobile "stuck" without a signal. It's one of the first steps to try, along with activating and deactivating airplane mode.
Can I have both the physical SIM and the eSIM active at the same time?
Yes, most modern mobile phones are dual-SIM and support one physical SIM plus one eSIM in parallel. The problem arises when both compete for the same function: if you leave the data line on the physical SIM, the travel eSIM becomes decorative, and vice versa. Check which line carries the data and, if the mobile remains confused, temporarily deactivate the physical SIM during the trip.
How long does it take for the eSIM to reconnect after landing?
Normally, a few seconds after deactivating airplane mode. If you're coming from a long flight, give it up to a couple of minutes before touching any settings: the mobile needs to register the line with the nearest antenna and sometimes tries several before connecting to the best one.
Conclusion
"No service" is scarier than it should be: in the vast majority of cases, it's fixed by choosing the eSIM as the data line, turning on roaming, and forcing network selection. Only if the plan has expired or run out of data do 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, take a look at all PuraSim eSIM plans and travel with the peace of mind of having internet from the moment you land.
