I am excited about getting the new iPhone on Friday but will miss the tethering ability of my current phone (Samsung Blackjack). So here's a unique question for you all... Is it possible to (i.e. has anyone) transfer an iPhone SIM card to another phone and been able to access data on the other phone? In short, I'm curious if I could occasionally put the SIM from my iPhone into my Blackjack and tether my laptop as normal. I'm guessing this isn't possible for several reasons (e.g. pain in the a$$, different data plans) but figured it's worth asking.