Password Protecting Phones

You can SIM lock (password protect) pretty much every AT&T phone. There's a catch though; it only allows a certain number of tries (3 or 10; can't remember) before it locks you out. Then you have to call AT&T for a code to punch in. If you mess that up a certain number of times (10, I believe), your SIM card fries itself and you end up having to go to a AT&T store for a replacement (free at AT&T stores; not free at retailers). Unless they've changed the system in the past year, that is.

You can SIM lock it - just be careful.