1. Press and hold the power button to open the options menu, and then click Restart. If it doesn't pop up, please press and hold the power button until the phone vibrates, and force it to restart.

2. If the third-party application crashes, it may be because the third-party application is incompatible with the mobile phone. Please restart the phone, uninstall the phone, and then download and install other similar applications.

3. If the crash still occurs after restarting, it is recommended to back up important data and restore the phone to factory settings.

4. If you can't operate the phone after the crash, please upgrade the phone forcibly. After the upgrade, the data stored in the mobile phone will be deleted.

5. If the problem still exists, it is recommended to back up the mobile phone data and bring the purchase invoice to the service outlets for maintenance.