Try the below if the signal is unstable or 2G / 3G / 4G / 5G frequently switches automatically:
1. Remove the metal phone case if using.
2. Avoid areas with dense crowds and poor signal.
3. Change the SIM card and see if the problem persists. If it doesn't, the issue may be with your SIM card.
4. Turn off airplane mode and turn it on again to check if the signal returns to normal.
5. Update the system to the latest version.
If the issue persists, please contact our Customer Support for further assistance.