As you already know that Apple has fixed the ICCID vulnerability that caused SAM unlock tool to work on iPhone. You can no longer unlock your iPhone 4 / 4S / 3GS using SAM. This has been confirmed by the developer and also by the iPhone Dev Team.
Those who have already unlocked their devices and saved their unlock activation tickets can still enjoy the unlocked devices. We have already shown you how to backup unlock activation using Redsn0w.
Cookie, a new jailbreak app has been introduced to make things more easier without requiring you to connect it with computer and redsn0w. Those who haven’t saved their activation tickets must react now to have the possibility of unlocking in the future. All you need to do is to open this app tap on “Upload Activation”
The same app can be used to restore your activation tickets to unlock your iPhone in the future. Cookie saves your activation tickets on the cloud unlike Redsn0w which creates a file and you have to save it to some safe location by yourself. All you need to do is to tap on “Restore Activation”
Cookie can be downloaded from Cydia at no cost. Cookie saves your activation ticket to Weiphone’s server along with IMSI (International Mobile Subscriber Identity) and UDID (Unique Device Identifier).