I read the news about T-Mobile's new Jump on demand plan. I think it is pretty cool for people who want to get the latest devices. One thing I don't quite understand is the transition for existing old jump plan users. So if I'm an old jump plan customer who's paying 10 dollars every month, do I need to pay full payment and trade in my existing phone in order to switch to jump on demand? Or I can trade in my phone and switch when I paid 50% of my device and jump program will cover the rest? Any idea, guys?