I need some help please

Restoring it to factory settings will still leave all of the AT&T stuff on it as it seems to be an AT&T variant. All resetting would do is delete all of the downloaded apps and files... It should still work the same.... To remove the stuff you are talking about you would need to root the phone and delete system apps which I don't know much about when it comes to international phones.

This is the best of my knowledge as I understand your question.

Sent from my Pixel XL using Tapatalk