Xiaomi 4 SMS is off.

Where did you buy the mobile phone? What is the system version? Try the following:

1, Xiaomi mobile phone comes with similar security software running in the background. If you install other security software, it may cause conflicts. It is not recommended that you install third-party security software, which may affect the normal use of the mobile phone.

2. If your system is not the latest system version, I suggest you open the network and try to update the system version. The new system version will add some new functions and fix some problems of the old version.

If it still doesn't work, I suggest you try to back up and empty the data, which may be caused by data interference. Backup: Security Center-Backup-Create a new backup and back up the data you need. Clear data: when the boot screen appears, press and hold the volume plus button and the power off button, and then let go to the recovery state. Enter Recovery & gt Chinese to clear data to clear all data.

4. You can also try to use a line brush machine. The wire brush is more thorough. I suggest you make a backup before you brush the computer.

Please download the official ROM package. ROM download:

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B please brush the machine according to the brushing tutorial:/thread-3104435-1-1.html.

C this is a video of rice flour brushing:/v _ show/id _ xnteymjq1mzi4.html.