Is it possible to carrier unlock an Iphone 4s using Cydia?

My Iphone 4s is Jailbroken, can I unlock my iphone to a different network using the Cydia app?

Yeah, but jailbreaking your phone voids your warranty… And there's no reason to jailbreak your phone any more just to unlock it. Http://gsmunlocklabs.com/unlock-iphone/

go there. It's a simple, permanent process that doesn't require any jailbreaking.