Verizon iphone 4 unlock service?

How do i unlock my verizon iphone 4? It does not have a sim card at all. Can someone please help me or direct me to someone who can provide the service.

Well depending on your iOS, you can jailbreak it and unlock the APN (unlock the network). If your iOS is 6.0.1 or above, your out of luck. You could also buy a "Gevey Ultra S", which is just a SIM slot that adapts your alternative network's SIM.

If you would like to jailbreak, I recommend ReDsNoW. Http://www.redsn0w.us/

Best of luck!