CDMA cell phone questions?

Hmm, I’m kinda getting the itch for a new phone. It’s been about 15 months, but I signed a 2 year contract with this one. What options do I have? There’s no SIM card to swap like on a GSM networked phone. Can I replace the phone without the Verizon being involved? Are there any options through Verizon, such as contract renewal or whatnot?