How to back up Xiaomi's short messages?

Er ... actually, you don't need a mobile phone, just find the backup function that comes with the mobile phone. Some mobile phones may not have this function, so you can download backup software.

Specific backup method:

First, download the "Baidu Network Disk" App in your Xiaomi mobile phone and log in. After logging in, find my-mobile phone backup-SMS backup-enter the SMS backup details page and make settings. Turn on the backup switch until all backups are completed.