I made a reserve for the iphone 4 to pick up at the apple store. I'll be purchasing the phone at the full retail price of $599 :/, and thats because I'm not eligible for the upgrade until later this year. Now heres my problem, when I open the box and have the phone in hand, can I just pop in my at&t sim(which I will cut down to make it look like a microsim) into the iphone 4 and begin using it just like that? Or would I have to wait for "dev team" to come out with the hacktivate/jailbreak for iphone 4? I'm worried the "activation" screen will pop up and won't disappear until I activate the new 2 year contract Thanks in advance!