Unable to unlock phone
I am trying to unlock a phone I purchased second hand for use on T-Mobile. The automated tool claims the phone is not an at&t phone despite the fact that it is.
I get this error:
"Looks like the IMEI number you entered doesn’t match an AT&T device. Try entering it again. Dial *#06# on your mobile phone to make sure you have the right IMEI."
I have followed those instructions and entered my IMEI.
The device is a Galaxy s7 Active.
I have tried the automated support bot. It has been very unhelpful. It requires a My AT&T account to do anything but alas! I am not an AT&T customer so I sadly do not have a My AT&T account. What do I do at this point? I would like to use the phone I just purchased.