X5max mobile phone uses qq synchronization assistant to back up short messages and restore them to the mobile phone. Why not?

There is no successful operation backup, and sometimes

It has something to do with the instability of this software.

I think the best backup method is to back up the data to.

On the computer, it is very stable.

Download the application software from the computer to use data backup.

You can back up the data on your mobile phone to your computer.

This will not affect the memory size of the mobile phone, and

Ensure data stability.