(T-mobile)? I have a family plan with 5 people including me. I really want a blackberry curve 8320, are plan has 2500 minuets, Unlimited text, email, IM and i think that's it (we might have internet) but i hear you have to have a special plan for a blackberry, will that just effect me or will it change everyone elses plan too. also how much does a blackberry cost a month (t-mobile)