Hi, I have this issue - I am on a shared plan (Unlimited data) - 2 smart phone lines (RAZR and iPhone 4S). I'd like to replace the RAZR with a new iPhone 5, but we are not due for renewal until June 2014. I don't feel like paying the $500+ upgrade fee for the iPhone. Someone said there is a way to add a third line and get the iPhone 5 for it without paying the full price. Is this true? How does it work? Thanks in advance for your help.