If your eSIM stopped working after a phone update, the cause is usually changed settings, temporary software bugs, network refresh issues, or reset mobile data options — not that the update deleted your eSIM.
This happens on both iPhone and Android. After a major update, users often notice:
- No Service
- signal but no internet
- eSIM line turned off
- wrong SIM used for data
- slow connection after update
The good news: most post-update eSIM problems are fixable in minutes.
This guide explains exactly why your eSIM is not working after a phone update and how to restore service fast.
Quick answer: Restart the phone, check if the eSIM line is ON, turn Data Roaming ON, confirm the eSIM is selected for mobile data, and review APN/network settings.
1. The update turned the eSIM line OFF
This is very common.
Some updates re-check line states or disable a secondary SIM temporarily.
Fix:
- Open Cellular / SIM settings
- Find your eSIM
- Turn the line ON
2. The wrong SIM is now selected for data
If you use dual SIM, updates may switch mobile data back to the primary SIM.
Fix:
- Open Mobile Data / Cellular Data
- Select the eSIM
Helpful reading: Why Is My eSIM Using My Main SIM Instead?
3. Data Roaming was turned OFF
Many travel eSIMs need roaming enabled.
After updates, this setting may reset.
Fix:
- Select the eSIM
- Turn Data Roaming ON
Helpful reading: Do You Need Roaming for eSIM?
4. APN settings were reset
Some Android phones and certain iPhone carrier profiles may refresh network settings.
This can cause:
- signal but no data
- apps not loading
- slow speeds
Fix:
- Check provider APN values
- Re-enter if missing
5. The phone needs network re-registration
After updates, the modem may need a clean reconnect.
Fix:
- Airplane mode ON for 15 seconds
- Turn it OFF
- Wait 1–2 minutes
6. Automatic network selection changed
The phone may now prefer a weaker roaming partner.
Fix:
- Open Network Selection
- Turn Automatic OFF
- Try another local carrier
7. Temporary software bug after update
Sometimes the first boot after update is unstable.
Fix:
- Restart again
- Install any follow-up patch update
8. VPN or Private DNS re-enabled
Some updates restore old settings or apps restart automatically.
Fix:
- Disable VPN temporarily
- Disable custom DNS
iPhone fix path
- Settings
- Cellular
- Select eSIM
- Turn On This Line
- Roaming ON
- Cellular Data = eSIM
Android fix path
- Settings
- Network & Internet
- SIMs
- Enable eSIM
- Preferred Data SIM = eSIM
- Roaming ON
Fast 60-second checklist
- Restart phone
- Enable eSIM line
- Select eSIM for data
- Roaming ON
- Airplane mode ON/OFF
- Check APN
Common traveler mistakes
Assuming update deleted the eSIM
Usually it only changed settings.
Ignoring roaming reset
Very common.
Not checking data SIM selection
Dual SIM devices often switch preferences.
Panicking before restarting
A reboot solves many cases.
When to contact support
Contact support if:
- line is ON
- roaming is ON
- APN is correct
- multiple networks fail
- issue began only after update and persists
Helpful page: Contact Support
Final thoughts
If your eSIM is not working after a phone update, the update usually changed settings rather than damaging the eSIM.
Check line status, roaming, data SIM selection, APN, and restart. Those steps fix most post-update problems quickly.
Need reliable travel data? Browse travel eSIM plans for your next trip.
FAQ
Did the update delete my eSIM?
Usually no. It more often changed settings or temporarily disabled the line.
Why do I have signal but no data after update?
Usually APN reset, wrong data SIM, or roaming OFF.
Should I restart after updating?
Yes. It often helps stabilize network functions.
Can updates switch my data SIM?
Yes, especially on dual SIM phones.
Will roaming turn off after updates?
Sometimes yes, depending on device behavior.