A network reset can clear corrupted connection settings after an update, provider change or persistent mobile-data fault. It is a later troubleshooting step, not the first response to every SIM problem, and it cannot repair a damaged SIM, broken reader, suspended account or network outage.
Check whether a reset is appropriate
Consider it only after you have:
- recorded the exact error;
- checked the provider's service status;
- restarted the phone;
- confirmed that the intended SIM or eSIM line is enabled;
- checked account activation, allowance and roaming;
- installed pending system or provider-settings updates.
What you may need to restore afterwards
The effect differs by device and reset option. It may remove saved Wi-Fi networks and passwords, Bluetooth pairings, VPN settings, customised APNs and preferred mobile-network choices. It should not delete photographs, apps or messages, but you must read the exact confirmation screen before proceeding.
Prepare first
- Save important Wi-Fi passwords.
- Record any employer, school or provider VPN and APN details.
- Make sure another device can access provider support.
- Keep eSIM activation details available, but do not assume an old QR code can be reused.
- Confirm that you are choosing a network reset, not Erase All Content and Settings or a factory reset.
iPhone
Use the current Apple route under Settings > General > Transfer or Reset iPhone > Reset, then choose Reset Network Settings. Read the on-screen description for your iOS version. Do not choose the separate option that deletes all eSIMs.
Google Pixel
On current Pixel software, open Settings > System > Reset options and use Reset mobile network settings. Menu wording can vary by version. Pixel also provides separate connection troubleshooting, so use the narrowest reset that matches the problem.
Samsung Galaxy
Current Galaxy guidance uses Settings > General management > Reset > Reset mobile network settings on supported software. Check whether the phone asks which SIM to reset.
After the reset
- Restart if the phone does not do so automatically.
- Reconnect to Wi-Fi.
- Confirm the SIM or eSIM line is enabled.
- Leave network selection automatic unless the provider says otherwise.
- Make an ordinary call and send a text.
- Turn Wi-Fi off and test mobile data.
If the problem remains
Contact the provider for provisioning, barring, SIM replacement, eSIM reissue, number-porting or APN checks. Seek device support if several known-working SIMs fail in the same handset.
A real-world check that prevents the common mistake
A network reset is a controlled diagnostic step, not a general repair. Record saved Wi‑Fi networks, VPNs, APN details and SIM defaults first, and confirm that the phone's reset screen does not include eSIM deletion. After the reset, reconnect one service at a time so the result can be attributed to the change.
- Test before reinstalling VPN or security profiles.
- Do not proceed to factory reset merely because the network reset did not help.
- Escalate account provisioning and outages to the provider.
Official information checked
- Apple Support: Reset iPhone settings
- Google Pixel Help: Mobile network settings
- Samsung UK: Reset mobile network settings
Information checked on 25 July 2026. Reset names and effects can change with software versions.
