ATT Samsung S8
I purchased this phone several years ago on eBay, used. I never used it on ATT network but rather Straight Talk and worked ok. I wanted to unlock the carrier on this phone but was given the response that it was denied because phone is still active under an ATT account. Obviously, I have no contact with the seller from years ago so is this phone permanently locked? Seeing I cannot have it removed from the ATT account it is registered to. Thanks in advance.