How do pre orders with Jump on Demand work?

od_hindu

    I currently have a Note 5 right now. I want to upgrade to the S7 Edge. I will be going to T-Mobile store to jump on release day. I really want the gold version of the phone, but I'm afraid there won't be a gold one left. I want to pre-order the phone, but how does it work with JoD, with having to trade in the phone and all?

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