If the signal is unstable, and the 2G/3G/4G/5G network switches frequently:
1. If you're using a metal phone case, we recommend you remove it.
2. Try to avoid places with dense crowds or poor signal.
3. Try replacing the SIM card for a comparative test to check whether it's a phone or a SIM card problem.
4. Turn Airplane Mode off and on to see if the signal returns back to normal.
5. Check whether the mobile phone system is up to date. Try updating the mobile phone system to the latest version and see if this affects signal.
If the issue persists, contact the Nothing Support Team for further assistance.