My mobile phone is Samsung S3, how can I restore the SMS to the original settings?

According to your description, restoring the factory settings of the mobile phone will erase all the data in the internal storage device of the mobile phone, including SMS, contacts, downloaded applications and so on. Therefore, before you restore the factory settings of your mobile phone, please back up the useful data in your mobile phone to avoid losing it. To restore the factory settings, please follow the following steps:

1. Under the standby page, click Application.

2. Click Settings.

3. Select Reset. If the system has been upgraded to 4.3, click the More tab to find the reset.

4. Click to restore the factory settings.

5. Click Reset Device.

6. Click Delete All.

After the restart, the phone successfully restored the factory settings.