Does restarting actually help?
Often yes, because a restart forces a full re-registration on the network. Try airplane mode for 15 seconds first, then one full restart if needed. Repeated restarts rarely add anything.
Restarting the phone is usually the first suggestion the team offers when an eSIM profile refuses to connect, and it sounds too simple for many people to believe it genuinely helps. This page explains why a restart works in many cases, which type to try first, which cases a restart cannot fix at all, and what to check both before and after every restart.
It suits anyone currently facing a connection problem mid-trip who wants to try fixing it themselves before contacting the team, as well as anyone who wants to understand the reasoning ahead of time, so as not to waste time trial-and-erroring once already abroad.
Why restarting genuinely helps
When a phone connects to a mobile network, it holds the registration state in the modem's temporary memory. If that state gets stuck in an incorrect way for any reason — switching lines too quickly, or travelling across coverage areas fast enough to confuse the modem — a restart clears that state entirely and forces the phone to re-register with the network completely from scratch.
That is why a restart so often fixes a 'no service' problem even when the profile is installed correctly and the plan has not expired, because in many cases the fault is not the profile at all, but a temporary connection state stuck in the phone at that moment.
Fifteen seconds of airplane mode before a full restart
Switching airplane mode on and off again within roughly fifteen seconds is a lighter step than a full restart, but works on the same principle: it cuts all network connections briefly, then makes the phone re-register the instant airplane mode is switched off, without powering the whole phone down and back up.
Always try this first, since it is faster and does not disturb other apps left open. If the symptom persists, move on to one full restart instead. A full restart clears state at a deeper level, since it restarts the whole operating system rather than just the networking component.
How to restart properly
- 1Try airplane mode firstSwitch airplane mode on, wait about fifteen seconds, then switch it off again. Check whether the destination network name reappears with signal bars.
- 2If it persists, do one full restartPower the phone down completely and switch it back on using that model's own method. The button and hold duration vary by manufacturer and model, so check the phone's manual if unsure.
- 3Wait for registration to finishAfter switching on, give it a moment to search for and complete registration with the network. Do not conclude it failed if only a few seconds have passed since it powered back on.
- 4Check the network name and data statusCheck that a destination network name shows with signal bars, and that data roaming for that line is still switched on. If both are in order and it still does not work, consider a cause other than the restart itself.
Cases where restarting genuinely fixes it
A restart usually works when the phone has just travelled across coverage areas, such as landing off a flight while the phone is still stuck trying to find the network from the home country, or when the eSIM line has just been switched on for the first time and the phone has not automatically moved to connect it. It also helps when the primary line has been toggled back and forth between the physical SIM and the eSIM several times, leaving the modem stuck on an old state.
In every one of these cases, the profile and the plan itself have no problem at all. What went wrong is only the temporary state on the phone at that moment, so a restart genuinely fixes the right thing without touching the profile in any way.
Cases where restarting cannot help at all
If the phone does not support eSIM at all, or is carrier-locked, no number of restarts will help, since the restriction sits at the hardware level or in the original operator's own setting, not in a temporary state a restart can clear. The same applies when the plan's data allowance has run out or the plan has expired, which is a plan-condition issue, not a connection issue.
If data roaming on the eSIM line was left switched off, or a different line was accidentally set as the primary line for data, a restart will not help either, since that is a setting that needs fixing directly in the phone's own menu. Restarting only confirms the same incorrect setting all over again.
| Cause | Does a restart help | What to do instead |
|---|---|---|
| Connection state stuck from crossing coverage areas | Yes | Nothing further needed after the restart |
| Carrier-locked phone | No | Ask the original operator to unlock it |
| Data used up or plan expired | No | Check remaining data or buy a new plan |
| Data roaming on the eSIM line switched off | No | Switch on data roaming for that line in the mobile network menu |
| Wrong line accidentally set as primary for data | No | Switch the primary data line to the correct one in the mobile network menu |
Checking settings before restarting saves time
Before restarting, it is worth opening the mobile network menu briefly to check whether data roaming for the eSIM line you want is switched on, and whether it has been set as the primary line for data. The menu's exact position varies by manufacturer and operating system version, but it generally sits under the mobile network or SIM settings section.
Checking these two things first takes under a minute and immediately tells you whether the problem is a setting you can fix right there, or a connection state that genuinely needs a restart, saving you from restarting first only to discover data roaming was simply switched off.
If the problem remains after restarting
If both airplane mode and a full restart have been tried and the symptom is unchanged, the next step is to check whether the phone is genuinely in an area where the destination network has coverage at all, since some areas still have dead spots. Try moving to a more open location first.
If moving location does not fix it, save a screenshot showing the network name, the data roaming status, and the time the problem occurred, then contact the team with your order number, so they can check the system-side status against what the phone is showing.
Before you restart, check these
- Whether data roaming on the eSIM line is switched on
- Whether the correct line is set as the primary line for data
- Remaining data allowance and the plan's expiry date
- Whether the current location genuinely has coverage
- Whether lines or SIMs have been toggled frequently in the last few minutes
Restarting is not the same as resetting network settings
A restart merely switches the operating system off and back on, without touching any saved settings. Resetting network settings is a far heavier step, since it erases every saved Wi-Fi password, forgets every paired Bluetooth device, and clears any custom APN configuration set beforehand. It is not a step to take simply because an eSIM profile is not connecting.
Always try airplane mode and a full restart in full first, and treat resetting network settings as a genuine last resort only, after every other cause has been checked and none found. It is worth consulting the team before taking this step, since the original settings cannot be recovered once it is done.
Crossing several countries in one trip, do you need to restart at every border
Not necessarily. Most phones register with the new network automatically once they cross into a country the plan covers, especially with a regional plan that uses one profile across several countries. But when crossing borders quickly by car or train, the phone can sometimes stay stuck on the previous network a little longer than usual.
If the network name still shows the previous country for an unusually long time after crossing the border, try fifteen seconds of airplane mode first, then a full restart if it still has not changed — the same approach used for every other connection issue on this page.
Does a restart fix a specific app, or only the overall connection
A restart primarily fixes problems at the network-connection level, not a problem specific to one particular app. If one app fails to work while other apps connect to the internet normally, that problem more likely sits with the app itself rather than the eSIM line's network connection, which is a separate matter from what this page covers.
A simple way to tell the difference is to open a web browser or another app and see whether it loads normally. If it loads fine and only one particular app has trouble, try closing and reopening that app, or checking its own specific settings, rather than restarting the whole phone.
Does a low battery affect the connection
Some phones automatically switch on a battery-saving mode once charge runs low, which can limit background activity for certain apps or turn off automatic data refresh, but it generally does not directly cut the mobile network connection itself. If you notice no signal alongside a very low battery, try charging the phone for a short while first and see whether the symptom changes, to rule out battery-saving mode as the cause.
If the battery returns to a normal level after charging and the no-signal symptom remains exactly the same, go back to the airplane-mode and restart steps recommended above, since that confirms the cause was never the battery in the first place.
FAQ
How many restarts does it take to help?+
One full restart is enough in nearly every case. If several restarts in a row make no difference, the cause is probably no longer a temporary connection state.
Between fifteen seconds of airplane mode and a full restart, which should I try first?+
Always try airplane mode first, since it is faster and does not disturb other open apps. Move to one full restart only if that does not fix it.
Does restarting risk deleting the profile?+
No, a restart is only the operating system switching off and on again, and does not affect a profile that is already installed.
If the phone is carrier-locked, does restarting help?+
No, since a carrier lock is a restriction set at the modem level by the original operator, not a temporary state a restart can clear. You need to contact the original operator to request an unlock instead.
Is restarting frequently during a trip harmful to the phone?+
It is not harmful to the phone itself, but it usually does not add anything if the first restart already failed to fix it. Look for a different cause instead of restarting again and again.
If a restart does not fix it, when should I contact the team?+
Contact the team as soon as both airplane mode and a full restart have been tried and the symptom remains unchanged, along with a screenshot showing the network name and data roaming status, so the issue can be looked into directly.