HOW TO UNLOCK MY IPHONE 4 to use on Verizon

Look, I don't mind paying a small fee. I've tried everything! I don't wanna have to download crap, it gives me virus's! I just want my phone unlock i'm so tired of all this BS! If there's a free unlocking service that be great. Please SOMEONE ACTUALLY TELL ME SOMETHING THAT WILL WORK! UGHH ;/

Added (1). I bought it off ebay. The provider is cellcom. Its a small business I guess and all the unlock site i've seen have not been able to identify it. I really just need help.

Added (2). Oh and also. The seller said cellcom and Verizon share towers and that it could be activated. I don't know

Call whoever its locked by, i know that o2 unlock for free if you have been with them for more than a few months

What is the message that is displayed when you plug in different sim card? What is your provider? Or you can lock for 4 or 5 dollars at ebay

http://www.ebay.com/...1251215167

note read the full description and instructions before you buy

Won't work.
you could try an unlock but still might not work.

Cellcom is a CDMA provider so their iPhone 4 can't be unlocked because it does not use a GSM SIM card.

You would have to find someone that will flash it to Verizon then you would have to convince Verizon to activate it.