how can i unlocked my verizon iphone?

No. Apple can't unlock it for you. Only the carrier can authorize unlocking it.

Verizon will unlock the SIM slot ONLY for current Verizon customers in good standing for use with foreign SIM cards. It can never be used with any US carrier other than Verizon. If you are not a Verizon customer, the phone is worthless to you.

You'd have to buy a different iPhone to get it unlocked (The unlocked model). Because of 3G Atteneas, you can not use it with any other carrier. Verizon doesn't use a SIM card so you can't attempt to unlock it.