if you don’t have the original SIM for activating you may have problems as described. i did it, having an unlocked iPhone 4S using SAM like this 1) download the firmware for my iPhone 4S 5.1.1 : iPhone4,1_5.1.1_9B206_Restore.ipsw 2) install the last iTunes 10.6.1.7 3) connect the iPhone on the original cable to iTunes and… Continue reading restore SAM on a 5.1.1 iPhone starting from 5.0.1