Need Help Unlocking Verizon 4S

Hello fello thevergians, I recently acquired a Verizon iPhone 4S via my cousin. I am currently using an htc one s through iwireless, a prepared subsidiary of both t mobile and AT&T. I know the 4s has both gsm and CDMA radios in in and I'm not too bothered that I more than likely wont get hspa service if I can make the switch.

What is the best way to unlock the phone without having to contact Verizon?