Right now I have a brand new iPod Touch and a few-months-old Blackberry Pearl (with unlimited T-Mobile data plan). I'm wondering if I can trade in my Touch for an iPhone and use my current T-Mobile plan with it. Is it possible? If I can continue paying my current $75/Mo. bill and switch my phone from the Blackberry to the iPhone I will probably do it...I just want to make sure I can access the internet, send/receive email, etc. first.