SAM, the Cydia application that allows us to unlock any iPhone model with any version of iOS has been upgraded. Latest release made the whole unlocking procedure much easier. Now you just have to insert the SIM that you want to use, which does not correspond to the original operator of your iPhone, select the original operator of your iPhone in SAM, access to the “Utils” and click “Try Activation.” that’s it, your iPhone will operate with the unofficial SIM you have inserted.
If you get it you can re-enter the original SIM and activate the iPhone, access SAM> More> Spoof, and then repeat the steps above. If you can not work this way test the old tutorial >> Unlock iPhone 3GS, iPhone 4 and 4S using SAM.