So heres the deal. I have 4 lines currently on the 700 minute family plan. 2 of the lines are smartphones with unlimited data, and 2 of the lines are dumbphones with no data. The reason for the 2 lines with dumbphones is simply extra upgrade lines. If I was to not use the upgrade on the smartphone lines, but use the upgrades on the dumbphone lines, and then transfer that phone over to my smartphone line, there would be no problem with that right? What I would do is when I get the upgraded phones, activate them on the dumbphone line, and then immediately reactivate the dumbphone on that line, and put the new smartphone on one of the main lines. Thats the easiest way I can explain that, tell me if it makes sense, and if its possible.