What should I do if the screen is not bright after Xiaomi 2s mobile phone swipes the card?

I suggest that you back up important data first, then restore and clear all data, and don't restore data temporarily after booting, and see if you can solve the problem. (System update-restart to resume; ; Or in the off state, press and hold the volume plus key and the off key, and then let go to resume when the boot screen appears. Enter Recovery & gt Chinese > clear data > clear all data. Or back up your data, wipe it, and brush a whole bag to try.