I won brand new Galaxy S7 through a work promotion. I have attempted to access the AT&T unlock portal - https://www.att.com/deviceunlock/request/#/unlockstep1. After entering the IMEI - I have been receiving the following message for days: "We're sorry, but we're having technical difficulties with our network at the moment. Please try again later."
Is there another option to unlock an AT&T phone?