Your IMEI number & device don't match
To whom it may concern:
My workmate have lend/gave me his spare Iphone 5 locked with AT&T and I'm trying to unlock it in the device unlock portal. So far, my first four attempts has given me the same feedback with
Subject: Your IMEI number & device don't match and,
1st line in the body: We can't complete your unlock request right now.
Can somebody please advise what I need to do, or is there something I'm wrong with what I'm doing, to unlock the phone?
Thanks in advance!