Can I get a Verizon iPhone 4s at the 2-year plan price?

Ok, So I have a 4s 16 GB. I have a family plan with Verizon but no upgrades available. I want to get a 32 GB 4s, trade my old one in, and put in the old one's sim card into the new one. Would I be able to get the new 32 GB at the 2-year plan price because I have a plan? Or would I need an available upgrade?

You could get an unlocked iPhone 4S and just tell Verizon to switch your plan over to that phone (I'm not sure this will work out though, because verizon doesn't use sim cards, they have something called CDMA which is built into the phone.) GO TO THE VERIZON STORE AND ASK IF THIS IS POSSIBLE BEFORE TRYING ANYTHING