How to cancel the black screen when oppoa7x calls?

Oppo a 7x canceled the black screen when making a phone call, and closed the screen to prevent misunderstanding.

Tools/raw materials:

oppo a 7x

Color 1 1.3

Set 1 1.3.

1. Open the settings of the mobile phone desktop and click the gesture in the settings.

2. Then click the switch at the back of the screen to prevent misunderstanding.

Just turn off the switch behind the screen to prevent misunderstanding.