According to your description, if you please operate:
1. If it is deleted by normal software uninstallation (Settings-Application Manager-Download-Find the self-contained software for uninstallation), please try to back up the data (contacts, text messages, pictures, etc.) if it needs to be restored. ) in the phone, and then restore the factory settings (Settings-Reset/Privacy/Personal-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.
It is recommended that you apply for "booking to the store" in Samsung official website and enjoy priority maintenance service:/pre-order.
If you have any comments, suggestions and comments, please click: support.samsung.com.cn/survey.