Sometimes after the mobile phone sends the SMS verification code, the mobile phone turns black for a while, turns bright for a while, and a lot of verification code messages appear. What happened?

1, many models of mobile phones have distance sensors above them. When talking, the top of the screen is blocked, and the screen will be black.

2. It will light up when there is no cover. This is to save electricity and prevent misoperation during the call.

3. At present, most smartphones have this function. If you don't need this function, you can turn off the distance sensor in the call answering status setting in the call settings.