I'm planning to use an update from my family plan to get the iPhone 5. It is a normal, non-smartphone currently. When I go to add the iPhone to this line, is it going to force me to add mobile share? I ask because I don't want to lose the unlimited data on my phone and my dad doesn't want to lose his a la carte plan either? What will happen when I go to put this iPhone on the line? Will it cancel out my unlimited and my dad's a la carte plan?