Popular iPhone Dev Team member known as @Musclenerd has confirmed that Apple technical engineers are patching ICCID Vulnerability to block SAM Unlock Activation.

A huge number of people who were stuck on iPhone 4 baseband 4.11.08 unlocked their iPhone using SAM unlock tool.
In addition @Musclenerd added that for the following few hours attempting SAM tool to unlock iPhone 4S, iPhone 4 on new SIM cards, but he hit a “miss”. All of us realize that Apple will fix their Activation servers anytime soon. However, the technical team need a few days to fix the Activation servers.

@MuscleNerd - SAM unlock status

Anyone who has previously has back up their unlock activation tickets via SAM Unlock tool still work. While Apple appears to fix ICCID Vulnerability in Activation servers, meaning people who’ve yet to back up their ulock activation tickets have, need to do it now before it’s too late.

Activation Info rejected. You must select original carrier SIMID

What should you do in this situation? Now Unlock your iPhone 4 / 4S using Updated SAM Unlock tool, and Backup Your Unlock Activation Ticket with most Recent version of Redsn0w.

Exactly what do you think? Have you unlocked your iPhone yet via Loktar_Sun’s SAM tool?