1. If the power button and volume button are stuck in the protective case or squeezed in the pocket for more than 12 seconds, the phone may restart. Please be careful not to squeeze the button.
2. Go to Settings-Quick and Auxiliary-Scheduled Task-time switch machine to see if the time switch machine task is set.
3. Too low or too high temperature will trigger the low or high temperature protection function of the mobile phone, leading to automatic restart. Please try to keep the phone at 0℃~35℃.
4. If the software is installed through a non-app store, it may be incompatible, causing the phone to restart. It is recommended to uninstall the software and try again after backing up the application data.
5. It is suggested to use I housekeeper to clean up the storage space of mobile phones in time, uninstall uncommon software and keep the remaining storage space above 20%.
6. System update will improve the compatibility and stability of the system for third-party applications, and some new versions will add some new functions. Please go to Settings-System Upgrade (some models are Settings-My Device -iQOOUI Version) to check the system version information. If it is not the latest version, it is recommended to upgrade the experience.
7. Enter Settings-System Management/More Settings-Backup and Reset/Restore Factory Settings-Restore all settings.
Note: Simply operating "Restore All Settings" will not delete any data or media files, but only restore all settings of the phone. Some third-party application accounts need to log in again. Please make sure that it will not affect the use of the software before operation. For the sake of data security of mobile phone, it is recommended to back up the data of mobile phone in advance before operation to prevent loss.
8. If the above methods can't be solved, please back up the data of the mobile phone in advance and take the mobile phone to the vivo customer service center for testing and processing. (Inquire about the address of vivo customer service center: go to official website /vivo Mall APP-My-Website or vivo official website Webpage-Sliding Bottom-Service Support-Service Website Inquiry-Select provinces and cities to inquire about the address of customer service center).
Tips: It is recommended to bring relevant purchase vouchers (such as purchase invoices/warranty cards/ID cards) before going, and call the staff of the service center in advance to ensure that the staff will go again during normal working hours, avoid running empty, and pay attention to safety on the way back and forth.