Can i unlock my iphone 4s?

Hello guys I wanted to ask you all how can i unlock my iphone 4s cuz im from europe and somebody sent me the iphone from USA and it’s locked and I can’t use othe SIM cards?
Answer #1
Only with GEVEY Ultras S
http://www.applenberry.com/store/gevey-sim/gevey-ultra-s/
Answer #2
ok thank you I wanted to ask u something else is there any jailbreak for iOS 5.1?
Answer #3
neoliciouz replied: ok thank you I wanted to ask u something else is there any jailbreak for iOS 5.1?
Tethered for A4 devices ONLY (no A5 or A5X)!