Here's a question for t-mobile customers (of which I'm one for voice). In addition to my phone, suppose I bring my own iPad for data - do I need to include it in my post-paid account with my phone and have that all under one account? Or can I have two accounts at t-mobile - one prepaid (for the iPad) and one post-paid (for the phone). As a customer - I think I'd like to go pre-paid for iPad data, to consume bandwidth as I need it, as opposed to manually bumping up and down any post paid "plan" as my usage changes over time. The latter just seems like a hassle, albeit potentially cheaper.