Hello Everyone, I have been a long time lurker of MacRumors and have registered to confirm something before I spend a hefty amount of cash. I am looking to purchase an iPhone 4 and use it on my already existing AT&T plan. My AT&T plan already has unlimited data and all the works so data usage wise I am set. I have been doing swaps to unlocked GSM phones for years, heck my AT&T plan still shows I have a Sony Ericsson S710a. Here are my questions as I know the iPhone activation is different; - I already cut my SIM down to micro using a cutting tool but can I just place the SIM card in and go or does the iPhone still require activation via iTunes? - If activation is required will it try and change my standard plan into one of the "iPhone Only" plans? Long term I will JB the iPhone eventually but I am more worried about the activation process as I have never done it myself and this isn't like my prior GSM unlock swaps where you plug in the SIM and your good. I did some google searching and pretty sure I know what needs to happen however would feel much better with some community feedback or links to accurate sources. Thanks!