Locked Used AT&T Phone
I purchased a used iPhone 5s from eBay that was listed as unlocked. While trying to insert another carrier's SIM I received a message that the phone was indeed locked. I tried to visit the Unlock portal but the website doesn't recognize the IMEI as AT&T even though the carrier settings show AT&T. I believe this is because it is an international version of the iPhone that could be used as either GSM or CDMA based on the starting digits of the IMEI. I was unable to use the Live Chat service since it requires an AT&T account and I tried calling but was unable to do anything without an AT&T account either. Both of those outcomes seem absurd when on the unlock device portal there's an option for whether or not you're an AT&T customer. Is there anyway to actually get this phone unlocked?