Is AT&T iPhone SIM free?

Is AT&T iPhone SIM free? - 1

AT&T, or any carrier (GSM) for that matter wouldn't sell the phone without a SIM card.

It would also likely be locked to them.

AT&T phones are locked to AT&T. Once the contract is up, OR you pay off the phone in full, you can request to unlock it: https://www.att.com/...iceunlock/