My iPhone broke, can I use my old phone and alter my verizon minutes and data?

So, I can't technically afford to get a replacement iPhone but I'm in a 2 year contract.

Can I use an old Blackberry and alter my data and minutes plan until my 2 year contract is up and then get a discounted iPhone and enter into another 2 year contract?

As long as the ESN on the BB is clean, then sure… Simple 10 minute call to Verizon