I am currently own a blackberry and want to upgrade to iPhone 4 but my upgrade date is not until August 28. I know they said they were moving up the upgrade dates by 6 months but on engadget they have a news release from AT&T which states only current iPhone customers will have their upgrade date moved up 6 months. So can I just put my sim in my friends iPhone, call AT&T and add a data package, and then they will move up my upgrade date? At this point my account would list me as a current iPhone user with an upgrade date in August. I can't seem to find anything wrong with this plan but was curious what others thought about it. I also called AT&T to verify that my upgrade date would not be moving up and they said no I could not upgrade until August. Thanks.