My Xiaomi 2a has been ringing like a text message for no reason these two days.

According to the problem you described, I suggest that you back up the important data first, then restore and clear all the data, and don't restore the data for the time being after booting to see if the problem can be solved. (Backup: Security Center-Backup, backup the data you need. Clear data: press and hold the volume up button and the power off button when the boot screen appears, and then let go to resume. Enter Recovery & gt Chinese > clear data > clear all data.

If you don't restore any software to work normally, it is very likely that your problem is caused by third-party software. When restoring the backup, please don't restore the third-party security software for the time being, and don't get root permission. See if it's normal.