1. Open the Settings from the desktop home screen
2. Find the battery option and click on it
3. Turn on the wireless reverse charging switch
4. The screen of Huawei Mate20 Pro mobile phone is placed upside down on the desktop with the back facing up, and the back of another mobile phone supporting wireless charging is placed in a font shape on the Mate20 Pro. It shows charging. You can also charge other wireless charging devices, such as IPHONEX, wireless electric toothbrush, etc.