Theres an offering before wherein you can do early recontracting to get iphone 5 but now its no longer offered.
there are two options you may choose to do
1. Early Pre-termination, you need to pay for the handset based price of your current plan (100%) if terminating within 12 months and (50%) of the handset based price if terminating 13 months prior to acquisition.
2. You may apply for another line+phone for as long as your credit limit can accomodate it if not additional financial documents maybe requested by Globe.