IPhone unlock - Verizon Wireless?

So my iPhone 4 Verizon contract ends next December, but I'm trying to plan ahead and decide on the best route financially, as I will be in college by then. If I unlock my iPhone, can I make a contract with a carrier that allows me to have unlimited voice and text, but no data? I talked to a Verizon rep today, and he said I can't have unlimited voice and text without a data plan, as "All smartphones need some sort of data plan when you sign up for a contract." So my next thought was could I do what I want to do if I unlock it?

Verizon iphone can only be used on Verizon.
Sell it and get a ATT iphone and use it on simple mobile $40 unlimited everything plan or straight talk $45 unlimited plan

Agree with new york, you can't unlock verizon iphone.