What should I do if the mobile card used in Unicom's red rice mobile phone can't receive SMS?

It is suggested that you back up important data first, then restore and clear all data, and don't restore data temporarily after booting to see if the problem can be solved. (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.