Why can't the flashlight be turned on?

Vivo mobile phone flashlight can't be used, and it can be operated as follows:

1, restart the phone;

2. Check whether it is caused by low power;

3. Clear all data. The operation method is as follows: enter the phone settings-system management/more settings-backup reset/restore factory settings-clear all data (this operation will delete all data in the system space, including SMS, contacts, notes, etc. ).

Tips: If you don't check the format mobile phone USB flash drive or SD card, the data in the mobile phone USB flash drive and SD card will not be deleted.

4. Handle the customer service center (address of customer service center: go to "vivo official website /vivo Mall" APP-My service outlets-select provinces and cities to inquire the address of customer service center).