Hello all. I have at&t as my service provider and an iphone 6s. I really like the oneplus 7 pro and it is on sale right now for $550 USD. If I were to buy the phone online, all I have to do is switch the sim cards and it would work properly correct? Or is there more that I have to do? On their website, attached below, if I understand correctly, means it is compatible with at&t. Although I don't know what the device approval part means. Thanks.