How to delete short messages on old mobile phones?

You can return the phone to the factory, and the setting method is as follows:

1. Back up important data in the mobile phone, such as contacts, information, photos, memos, etc.

2. Settings-Reset/Backup and Reset (Account-Reset)-Restore factory settings (the setting method of some mobile phones is: Settings-Privacy-Restore factory settings). After the operation is completed, the machine will automatically restart.

Note: If the factory setting prompt password is restored, it is suggested that:

1. If the phone has a screen lock password, please enter the screen lock password.

2. If the phone is turned on to reactivate the locking function, please enter the account password.