You've landed, switched on your phone, and the eSIM appears installed but there are no data: no internet, no maps, and no WhatsApp. Before you panic, in 90% of cases it's a setting that can be fixed in less than a minute. In this guide, you'll go in order, from the easiest to the most unusual, until your eSIM starts providing data at your destination again.
Quick fix in 60 seconds
If the eSIM is installed but not browsing, do this in order: activate data roaming for the eSIM line, set it as the mobile data line, turn off Wi-Fi, and restart the phone. This resolves most cases in less than a minute.
The most common mistake is having the eSIM installed but still using your Spanish SIM as the data line: then the phone tries to connect via your home operator, which may be blocked abroad or charge you exorbitant roaming fees. The key is for the phone to know which line to use for internet access. Before reinstalling anything or asking for a refund, go through the following five steps: almost always one of them is the culprit. And remember that a data eSIM does not come with a Spanish phone number, so calls and regular SMS will still go through your usual line; here we are only fighting for data.
Traveler's tip: activate and install the eSIM with Wi-Fi before leaving home. That way, when you arrive, you just have to turn on your phone and it will already be browsing. Installing without a connection at the destination airport is the perfect recipe for panic.
Activate data roaming for the eSIM
Roaming is what allows the eSIM to connect to a network in another country. It sounds contradictory —"but I bought the eSIM to avoid paying roaming"— but you don't pay anything extra: the plan already includes that data. Roaming is just the technical permission to connect to the local antenna. If it's turned off on the eSIM line, the phone will lose data signal even if everything else is fine.
On iPhone: Settings > Mobile Data > tap the eSIM line (travel plan) > activate Data Roaming. On Android, it's usually in Settings > Connections > Mobile Networks > select the eSIM > Data Roaming. Do this only for the travel eSIM line, not for your Spanish SIM, to avoid the risk of charges from your home operator. If you have doubts about how this permission works, we have a dedicated guide on how to activate data roaming step by step with screenshots.
Set the eSIM as your mobile data line
With two active lines (your Spanish SIM + the travel eSIM), the phone needs to know which one to use for browsing. If your home line is still selected, you'll see coverage but no data —or data that costs an arm and a leg—. This is, by far, the number one failure when someone says their eSIM isn't working.
On iPhone: Settings > Mobile Data > Mobile Data (top) > choose your travel eSIM. Also disable "Allow Mobile Data Switching" so it doesn't automatically switch to your Spanish SIM and generate expensive roaming charges. On Android, in the SIM or SIM cards section, choose the eSIM as preferred for mobile data. After changing it, activate and deactivate airplane mode for a few seconds to force a re-connection. If after this the line appears but still doesn't browse, check our specific guide on eSIM installed but no data, which covers more stubborn cases.
Check the APN and manually select the network
The APN is the gateway through which your mobile accesses the internet. Almost all eSIMs configure it automatically, but some older Android phones or phones heavily locked by their operator may end up with a blank or incorrect APN. The result: 100% coverage and zero data. It's less common, but when it happens, it's very confusing because everything seems correct.
- Check the APN: in Settings > Mobile Networks > Access Point Names for the eSIM line. If your provider's instructions gave you a specific APN, enter it exactly as provided (including capitalization).
- Select the network manually: disable automatic network selection and manually choose a local operator in the country. Sometimes the phone connects to an antenna without a data agreement, and forcing another one is enough.
- Unlocked phone: make sure the phone is unlocked and not tied to an operator; if it is, it may reject other networks. Here it helps to know if your phone is truly eSIM compatible.
Check active plan, date, and country coverage
If everything is technically fine, it's time to check the plan. Many eSIMs start counting when they first connect to a destination network, not when you install them. Others have a validity window: if you purchased weeks in advance, check that it hasn't expired before your trip. And confirm that the country you are in is included in the coverage of the plan you purchased.
| Symptom | Probable cause | What to do |
|---|---|---|
| Installed, no data, first day | Roaming off or wrong data line chosen | Steps 2 and 3 |
| Was working fine and suddenly cut off | Data exhausted or plan expired | Check consumption and validity |
| Coverage but 0 data | Empty APN or network without agreement | Step 4 |
| eSIM line doesn't appear | Incomplete installation | Reinstall profile |
Check your gigabyte balance in your provider's app or panel. If they are truly exhausted, no adjustment will help: you need to recharge. And pay attention to the exact country: a "Europe" plan doesn't always cover destinations like the UK or Switzerland. If you're staying for a long time, plan how much data you need for your trip so you don't run out halfway.
Errors by system: iPhone and Android
Each system has its quirks. On iPhone, the classic is that the eSIM line disappears from Settings or that "Allow Mobile Data Switching" causes the phone to switch to your Spanish SIM without warning. On Android, the fragmentation between brands (Samsung, Xiaomi, Google Pixel…) means that menus change location and that the APN sometimes has to be entered manually.
A complete restart solves more problems than it seems: turn off the phone completely, wait ten seconds, and turn it back on. If the line doesn't appear anywhere, perhaps the installation was interrupted and you need to reinstall the eSIM from the QR or code. And if none of this works and you still can't connect at your destination, check the complete checklist of why the eSIM doesn't connect abroad, which covers edge cases. Before giving up on the eSIM, good Spanish-speaking support can get you unstuck in minutes.
Frequently asked questions
Why is my eSIM installed but has no data?
Almost always for two reasons: data roaming is turned off on the eSIM line, or the phone is still using your Spanish SIM as the data line. Activate eSIM roaming, set it as the mobile data line, and restart. This resolves the vast majority of cases in less than a minute.
Do I need to activate roaming even if I bought the eSIM to avoid it?
Yes, but you don't pay anything extra. Roaming is just the technical permission for the eSIM to connect to a local antenna in the country. The data is already included in your plan, so activating it doesn't generate charges. Without that permission, the phone won't access the internet even if everything else is fine.
When does my eSIM plan start counting?
It depends on the provider. Many eSIMs start counting validity when they first connect to a destination network, not when you install them. That's why you can install it days in advance at home without using anything. Always check the activation conditions of your specific plan.
What do I do if the eSIM was working fine and suddenly cut off?
This usually means you've run out of data or the plan has expired. Check your gigabyte balance and validity date in your provider's app or panel. If they are exhausted, you'll have to recharge or buy a new plan; no setting will fix it.
Can I lose data by using the wrong APN?
Yes. If the APN is empty or incorrectly configured, you will see full coverage but zero browsing. This is rare, because most eSIMs configure it automatically, but on some older Android phones or operator-locked phones, it's worth checking and entering it exactly as your provider indicates.
Conclusion
An eSIM "not providing data" is almost never an eSIM failure: it's a roaming, data line, or APN setting that can be corrected in seconds. Go in order, restart, and check the plan before giving up. The best prevention is to install with Wi-Fi before traveling and choose an eSIM with Spanish-speaking support that can resolve your questions instantly.
