10 years ago, when AT&T was AT&T, I got a promotional plan... unlimited minutes + text messages for $99 a month. We've kept the contract, extended it for YEARS, even with Cingular... they had to honor it. I just bought an iPhone, and I was wondering... do I really need to be setup for another two years? Can I add the iPhone data plan+unlimited text ON TOP OF my existing plan? I thought I read someone say that you can pop out the SIM and switch?