Summary: All I had to do once my package arrived was plug it in, let it charge, and then set it up. I restored an old backup and got all my stuff on it from my old 3GS and it works great. Came in great shape too. It is set up as CDMA but has a slot for a sim card though I haven't gotten that open yet, but I don't need to. I did a search on the IMEI number on tracfone, t-mobile, and at&t to see if I could bring the phone over to any of their networks if I want to.