recommend an imei unlock for an iphone 4S

[stuckinchuck]

My brother lives in the USA, and has been recently transferred to the Caribbean. He's asked me to find a way to unlock his verizon iPhone 4S. I can't seem to find a good software jailbreak unlock, so if anyone has had any experience with an imei unlock, i'd appreciate a tip on where to go.

Thanks.

[Azure]

Only the carrier or Apple themselves can do a REAL unlock.