Your eSIM was installed without a problem, but it says "No service" at the top, or the phone simply can't find a network. This happens more often than it seems, and in most cases, it can be fixed from your phone's settings in a couple of minutes. Follow these steps in order: from most likely to least likely.
What to do if my eSIM has no signal? The 5 steps that resolve most cases
If your eSIM has no signal, check in this order: that the line is activated as the data line, that data roaming is on, that the phone searches for the network manually if automatic mode doesn't find it, restart the device, and confirm that the activation date and destination match your plan.
You don't need to try all five at once. Start with the first, check if the mobile data icon (LTE, 4G, or 5G) appears next to the operator's name, and if nothing changes, move to the next. The table summarizes the most common causes so you can quickly identify yours before going into the details of each step.
| Probable cause | How it manifests | What to do |
|---|---|---|
| The active data line is still the physical SIM | There's a signal, but the internet doesn't load in any app | Change the default data line to the eSIM |
| Data roaming off | Wi-Fi works, mobile data doesn't, even when you're away from home | Turn on data roaming for the eSIM line |
| Automatic network selection doesn't find an operator | "No service" or "Searching..." appears constantly | Search and select the network manually |
| Network settings with stuck cache | It worked upon arrival and stopped working for no apparent reason | Restart the phone or activate and deactivate airplane mode |
| Plan expired or outside the contracted area | Doesn't connect from the start or suddenly stops connecting | Check activation date and coverage of the purchased plan |
Step 1: Confirm that the eSIM is the active data line
The most common cause is not that the eSIM is incorrectly installed, but that the phone is still using another line for data. If you have dual SIM (your usual physical SIM plus the travel eSIM), the operating system chooses a single line responsible for mobile data, and if you haven't manually changed it, all traffic will continue to try to go out through the wrong line. From there, the eSIM may appear "activated" in the list and still not carry a single megabyte.
On iOS: Settings > Mobile Data > Mobile Data, and select the eSIM line. On Android, it's usually in Settings > Network & Internet > SIMs, with an option to choose which line uses mobile data. If you see both lines listed but only one marked as preferred, that's the problem in most cases. If you want to review the entire process from scratch, the eSIM installation guide shows each screen step by step.
Step 2: Activate data roaming
Even if the eSIM is already your primary data line, if data roaming is turned off, the phone connects to a local tower but refuses to use it for browsing. This is the most frequent confusion among travelers who use Wi-Fi at the hotel and don't notice the problem until they go out without a network.
On iOS, within the eSIM line, look for "Data Roaming" and activate it. On Android, within the details of that SIM, the option usually says "Roaming" or "Data Roaming." This setting lives separately from the one that chooses the main line, so checking one without the other leaves the problem halfway solved.
Step 3: Select the network manually if the phone doesn't find it on its own
When automatic mode doesn't find any operator, the phone doesn't always say it clearly: sometimes it just gets stuck on "Searching..." without indicating that networks are available but it's not picking them up. Forcing a manual search usually unblocks it.
| System | Where to search for the network manually | What to do if none appear |
|---|---|---|
| iOS | Settings > Mobile Data > eSIM line > Network > deactivate "Automatic" | Wait for operators to list, exit and re-enter the screen |
| Android | Settings > Mobile networks > Network operators > deactivate automatic selection | Move away from windows or metal structures and repeat the search |
If an operator appears in the list but choosing it results in an error, try another one that offers the same coverage before assuming the problem is with the phone. Many data plans for travelers connect to more than one local operator per country, so if one fails, the next one on the list usually works without you having to change anything else.
Step 4: Restart your phone and update network settings
If steps 1, 2, and 3 didn't change anything, the problem might be that the phone has the previous network configuration stored in its cache, which is common right after landing and changing countries in an instant. Restarting the device forces the system to re-register the line from scratch.
Before completely restarting, try something faster: activate airplane mode for ten seconds and then deactivate it. This forces a new network search without turning off the phone. If that doesn't solve anything, then a complete restart is advisable. It's also worth confirming that the phone model supports data eSIMs without restrictions: the list of eSIM compatible phones clarifies which devices and operating system versions allow it without carrier blocks.
Step 5: Check the activation date and coverage area of the plan
With the technical part ruled out, the last point to check is the plan itself. A data plan for travelers has a specific activation date and geographical coverage: if you bought an eSIM for one country and are in another, or if the plan has already expired, no phone setting will make a signal appear, because the problem is not with the device.
With PuraSIM, the eSIM activates in approximately 1 minute once you install it, and you have 180 days from purchase to activate it, so if you bought it in advance and activated it on the wrong day, that discrepancy also explains the lack of signal. Check your purchase confirmation email to confirm destination and validity before looking for the problem elsewhere.
Why does my Telcel eSIM have no signal?
If the eSIM you installed is from your own operator (for example, to have a second local line while keeping your main number), the lack of signal almost always falls into the same two causes as steps 1 and 2: the active data line is not correct, or data roaming for that specific line is off. The difference is that, being a line from your own country, it's easy to assume that "it doesn't need roaming" and leave that box unchecked, when the phone still treats it as a separate line with its own settings.
Another frequent cause with eSIM lines from local operators is that activation takes time to propagate: the profile is installed, but the network has not yet finished recognizing the line as active on the operator's side. In this case, the only thing that works is to wait a few minutes and repeat step 3 (manual network selection) before assuming something is misconfigured.
Why isn't my eSIM working even though it installed correctly?
Installing and activating are two different things, and that's the most common confusion behind this question. Installing means that the eSIM profile is saved on the phone and appears in the list of lines. Activating means that this line is already connected to a network and ready to carry data. You can have a perfectly installed eSIM and still have no signal, because the network connection part was never completed.
A data eSIM for travelers does not provide a phone number or voice line: the "No service" icon next to the operator's name is normal for this type of line, because it never had to make calls. What you need to look at is the mobile data icon (4G, 5G, or LTE), not the call signal icon.
If after installing you never saw the operator's name appear at any time, not even for a few seconds, it is likely that the profile did not finish downloading. In that case, it is advisable to check the Wi-Fi connection you had at the time of installation (profile download requires internet) and repeat the entire process from scratch instead of continuing to adjust roaming and network selection on an incomplete profile.
I have a SIM card but no signal: rural areas and buildings
When all settings are correct and the problem only appears in certain places (inside a building, in a basement, on a road, or in rural areas far from cities), it is most likely not a configuration problem but rather a problem with the local operator's physical coverage at that exact point. This happens equally to a physical SIM and an eSIM: neither will magically create a signal where the operator has no tower nearby.
Before assuming it's a coverage issue, it's worth confirming that it's not, once again, step 3: in weak signal areas, automatic mode tends to get stuck on an operator you've already lost, instead of jumping to the next available one. Forcing a manual search and choosing another operator from the list usually restores the connection even in areas where the first one doesn't reach well. If the phone in question is an unusual model or was manually unlocked, it's also worth ruling out a compatibility issue before blaming coverage.
When the problem is with the provider, not the phone
If you have already checked all five steps, tried more than one operator from the manual list, and the problem persists in a location where other people do have a signal, then the point of failure is probably on the eSIM provider's side: a profile that was not properly activated in their system, or a plan that was not correctly linked to the local operator. At that point, continuing to tweak phone settings will not solve anything.
That's where your choice of provider matters. With PuraSIM, support is available 24/7 in all languages via email and WhatsApp (no phone line, by design: written messages allow attaching screenshots and resolving issues faster than a call), and covers more than 200 destinations, so if the current plan doesn't respond, checking the available plans for your destination is a reasonable step before losing more travel time without internet. You can see the country options in the international eSIM collection. If you are still comparing this option against your home operator's roaming, the eSIM vs. traditional roaming comparison helps you decide before your next trip.
Frequently Asked Questions
How long does it take for an eSIM to activate after installation?
With PuraSIM, activation takes approximately 1 minute once you install the profile and connect it to an available network at the destination. If several minutes have passed without any operator appearing, it's advisable to review step 3 (manual network selection) before assuming something went wrong.
Do I need to remove my physical SIM for the eSIM to work?
No. The eSIM and physical SIM can coexist on the same phone, and in fact, it's normal to keep the physical SIM for calls and SMS with your usual number, while the eSIM handles only travel data. The important thing is that the active data line is the eSIM, as explained in step 1.
Why does my eSIM show "LTE" or "5G" but I can't make calls?
Because it's a data eSIM, not a voice line. It does not include a phone number or call minutes: it only carries internet. For calls and SMS, continue to use your usual physical line, and for internet calls, you can use any messaging app with active data.
Can I buy the eSIM before traveling and activate it later?
Yes. You have 180 days from purchase to activate the eSIM, so you can buy it in advance and install it whenever you want, as long as you activate the data line at your destination (or just before arriving), not before.
What does "network unavailable" mean when searching for the operator manually?
It generally indicates that the phone did detect the signal of that operator, but the registration attempt failed, either due to momentary congestion of the local network or because the plan has not yet finished linking on the provider's side. Wait one or two minutes and repeat the search before trying another operator from the list.
Does the eSIM work if my phone is in airplane mode with Wi-Fi activated?
Not for mobile data: in airplane mode, the data line turns off along with the rest of the antennas, and only Wi-Fi continues to work separately. If you need to browse without relying on the Wi-Fi of your location, airplane mode must be deactivated.
How do I know if my phone is eSIM compatible?
Most mid-range and high-end phones from recent years are, but it varies by model, country of purchase, and whether the device was factory unlocked. The list of eSIM compatible phones details what to check before buying a plan.
What do I do if I've tried all five steps and still have no signal?
Contact the provider's support with screenshots of your network settings and the exact error message. With PuraSIM, support responds 24/7 in all languages via email and WhatsApp, and can check on the system side if the profile was correctly linked to the local operator.
In summary
Before thinking that your phone or eSIM is damaged, check the five steps in order: correct data line, data roaming on, manual network selection, device restart, and verification of the plan's date and coverage. In practice, most cases are resolved in the first or second step, because these are settings that the phone doesn't always configure on its own when switching from a physical SIM to an eSIM.
If you've gone through all five steps and the problem is still on the provider's side, it's worth looking at options with genuinely accessible support. The PuraSIM international eSIM collection covers more than 200 destinations with 24/7 support via email and WhatsApp, so if you need to resolve an issue before continuing your trip, you have someone to write to immediately. And if this isn't your first time dealing with connection problems while traveling, the eSIM common problems guide gathers other cases that don't fit into a simple "no signal," along with the complete guide to traveling with eSIM if you want to have everything set up before your next flight.
