at&t use gsm only, what is the exact model of the phone?
samsung s7 SM-G930VL. it uses a sim card that is cdma. can i flash it to gsm?
That looks to be a straight talk model, why don't you just contact AT&T and see if that phone will work on their plan? AT&T does not use CDMA, they use GSM. Verizon and Sprint use CDMA.
im on my dads account and i cant talk to att withouth my dads pw and login. its okay i just wont use it
So then have your dad check. It's a lot simpler to just go the source. If you are not the owner of the account you can't add the phone anyway without the right info to logon and do the change or talk to a rep to help you.