Huawei M20 dialing black screen, WeChat voice phone black screen.

During the call, there is a distance sensor at the top, which will automatically close the screen when something approaches during the call to prevent touching the screen by mistake.

Suggestion:

A certain distance above the screen can wake up the screen.

Solution:

1. Using non-standard protective film will cover the sensor. It is recommended to buy a special screen protective film for this mobile phone.

2. After the phone is set to automatically shut down, it will automatically shut down after the set time is reached.

3. If the above methods still can't be solved, please back up the data and go to Huawei Customer Service Center for testing.