My wife and I each have an iPhone 5 and would like to upgrade to the 5S. I'm willing to pay the ETF (we have a year left) and start a new contract. We want to keep our phone numbers. How do I actually break the current contract? Assuming I can find the phones in stock, does my old contract get terminated upon activating the new one? Do I need to set up both phones at once (i.e. if I can't find them both in stock at the same time do I have to wait)? Can I do this online, or would an Apple store or Verizon store be better?