Change line price?
I currently have two lines with Sprint and am considering starting up a third to get an iPhone 5. One of my lines will be done in March, so I will just let that one end when that time comes. Adding a third line entails an extra $29.99/month for a smartphone. However, I would like to know if it would be possible to move the iPhone 5 to one of my current lines (which are already smartphone ["premium data"] lines) and then drop the new line to the $19.99 non-smartphone level. I ask because I'm aware that Sprint lets you change your plan mid-contract, but I don't know if the new agreement requires the line to be configured as a smartphone line for the full two years (given the subsidy one receives).
Any help on this would be greatly appreciated.