I have AT&T, so if you have them as your carrier as well, all you have to do is pop in your SIM card and you are ready to go. The phone is in perfect, brand new condition. Comes with charger, battery, RIM holster, USB cable, software and the original box.
Other, i.e. simple AT&T phones considered. I'm a big fan of the RAZR, so new to lightly used is acceptable.