update: Apple is working on blocking the method, so it may not work for all
i do have an unlocked iPhone 4s now 🙂 using SAM method.
It can be configured for any jailbreak iPhone as they say, but i did had some problems, telling that the phone is not activated, so you may need the original sim carrier to activate or use a trick.
It should be better now without the problems that gevey sim ultra may have(moving the sim card on the gevey tray on crush etc).
i did made a backup of my iPhone unlock ticket after unlocking with SAM. It’s very important to do this to ensure continued unlock of my SIM in the future.