How to restore Samsung's mobile phone software when it is deleted?

If you have deleted the software in your mobile phone before and need to restore it now, please operate: 1. If it is deleted by uninstalling the software normally, if it needs to be restored, please try to back up the data (contacts, text messages, pictures, etc.) in your mobile phone. ) and then restore the factory settings. 2. If the software itself cannot be deleted, you have changed the permissions of the mobile phone through a third-party software and uninstalled it. If it needs to be restored, it is recommended that you send your mobile phone to the Samsung service center and let the engineer help you solve it.