Exactly. I have a pin on my account after identity thieves opened a bunch of AT&T and Verizon accounts under my name (thanks Equifax!). Since this happened I’ve been in the AT&T stores when I bought an unlocked phone on two occasions. The employees at the store weren’t able to do a thing until I spoke with a special call center on the phone and did verifications.

One time there was something wrong on their end and no one could do anything until the system to verify my pin was back up.