How to back up SMS before the phone is restored to factory settings?

1. Download the 360 Mobile Guardian application on your mobile phone, open it, and click the security backup option. ?

2. After entering the secure backup, click the account button in the upper right corner.

3. Enter "Account" and "Password" on the opened page to log in. If you do not have an account, you can register first.

4. Then click the Start button.

5. Click the Backup Now button.

According to the specific types of problems, step disassembly/cause principle analysis/content expansion, etc.

The specific steps are as follows:/The main reasons for this situation are ...