Why can I call and send text messages when my vivo phone is black?

Detection method of black screen of mobile phone;

1. Confirm whether the mobile phone is damaged by liquid entering or falling (if a black screen appears at night or after falling, users are advised to send it for repair and deal with it after sale; If not, it should be removed);

2. Confirm whether the phone displays a black screen after double-clicking the screen;

① Origin OS/FunTouch OS 9.2/iQoUI and above: enter the phone settings-quick assistance-intelligent somatosensory-intelligent bright screen off-close and double-click to close the screen;

2 2 ②Funtouch OS 9.2 or below: You can enter the mobile phone settings-smart somatosensory-smart bright screen off-close and double-click to close the screen;

3. Forced restart of mobile phone recovery;

① ① models of funtouch OS 3.2 and subsequent systems: press and hold the "power button"+"volume reduction button" 10 second at the same time;

② Press and hold the top round key 10 second or more to forcibly restart the mobile phone (NEX 3/NEX 3S is applicable);

③ Model of the system before ③Funtouch OS 3.2: Press and hold the "power button" for more than 12 seconds;

4. Check whether there are too many programs running in the background to cause a black screen;

5. Check whether the storage space is enough;

6. Whether it is the latest system, but not the latest system that needs to be upgraded;

7. Confirm whether the screen turns black after reaching the set automatic screen locking time;

Enter Settings-Display and Brightness-Auto Screen Lock, and adjust the screen lock time to a longer time;

8. Whether the screen is black during the call, in order to avoid touching the screen by mistake, during the call, when the infrared sensor is blocked, the phone will automatically turn off the screen, and it will light up when it is far away;

9. Restore all settings;

Go to Settings-System Management/More Settings-Back up and reset/restore all the settings in the factory settings (restoring all the settings will not delete any data or media files, but only restore all the settings of the mobile phone, and some third-party application accounts need to be logged in again, so please ensure that the use of the software will not be affected before operation).

10, handled by the customer service center (customer service center address: go to vivo official website /vivo Mall APP-My-After-sales outlets-select provinces and cities to check the customer service center address).