How to recover data loss after Xiaomi system upgrade?

The premise of data recovery is that there is a mobile phone backup or data synchronization in Xiaomi account. There is no way without data. The recovery method is as follows:

Backup and recovery method through mobile phone:

1, open the phone settings;

2. Enter other advanced settings-backup and reset;

3. Click to enter local backup;

4. Select the historical backup package, and then click Start Recovery to wait for the recovery to complete.

Synchronous recovery through cloud services:

1, log in to Xiaomi account first;

2, open the settings, click to enter the synchronization and open;

3. Exit synchronization, enter system application, and choose to enter millet cloud service;

4. Click to open the content to be synchronized.