1. Check whether the power button and volume button are touched by mistake.
If the power button and volume button are stuck in the protective case, or squeezed in the pocket for more than 12 seconds, it may cause the phone to restart. Please be careful not to squeeze the button.
2, check the phone settings
Go to Settings-Quick and Auxiliary-Scheduled Tasks-time switch machine to see if the time switch machine task is set.
3. Check whether the mobile phone is in an environment with too high or too low temperature.
Too low or too high temperature will trigger the low or high temperature protection function of the mobile phone, resulting in automatic shutdown or restart. Please try to keep the phone at 0℃~35℃.
4. Uninstall incompatible software.
If the software is installed through a non-app store, the phone may be turned off or restarted due to incompatibility. It is recommended to back up the application data and try after uninstalling the software.
5. Check whether the storage space is enough.
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%.
Note: Uninstalling the software will delete the software data. Please pay attention to backup data.
6. Upgrade the system version
Check whether the mobile phone system version is the latest version. System update will improve the compatibility and stability of the system for third-party applications, and some new versions will add some new functions.
7. Repair the system
Enter "System Repair Mode", then click "Install System Software"-enter "Update the Latest Version by Networking", click "OK" (it is recommended to connect the charger)-connect the available WiFi, and click "Download and Install" to update the mobile phone system after detecting the upgrade package.
How to enter the system repair mode:
Models launched before September 20 17 (models before X20): Press the "Power button" and "Volume+"to enter the recovery mode when the machine is turned off;
Models listed after September 20 17 and new models listed later (X20 and later): Press "Power button" and "Volume+"to enter the quick start mode when the machine is turned off, and then enter the recovery mode through menu selection. Select: install the system software, and then select: update the latest version through networking;
NEX 3/NEX 3S: Press and hold the top round key 1.5 seconds in the off state, then press and hold "Volume+"to enter the quick start mode, press "Volume-"to move to "Enter Recovery", and press "Power" to confirm to enter the recovery mode.
8, service center testing
If the above methods can't be solved, please back up the mobile phone data in advance and take the mobile phone and purchase voucher to vivo customer service center for testing.
Tips: It is suggested to call the staff of the service center in advance when going 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.