1, clear Bluetooth program data.
Please go to Settings-Applications and Permissions/More Settings-Application Management-Top Right Point/More-Display System Programs-Bluetooth-Store-Clear Data, and then connect to the test.
2. Reset network settings
Go to Settings-System Management-Backup and Reset-Reset Network Settings-Reset Settings, and then use View.
Note: Resetting the network settings will clear the connection records such as WLAN, mobile data network and Bluetooth; Dual cards need to select the corresponding SIM card.
It is recommended to back up before the above steps: enter cloud service-device cloud backup-backup data type-system data-return-immediately back up some system settings and desktop layout that can be backed up; Cloud service-data synchronization-turn on WLAN and Bluetooth to synchronize data to cloud service.
If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.