As we reported, Apple quietly released an updated version of iOS 5.1.1 for the GSM model of the iPhone 4 yesterday evening. iOS 5.1.1 build 9B208 is currently not jailbroken, so if you installed build 9B208 by accident, the best course of action would be to restore to the previous build of iOS 5.1.1 (9B206). Apple still seems to be signing 9B206, so if you’re looking to run iOS 5.1.1 on your iPhone 4, install the jailbreak-compatible version while you can.
It’s currently unknown how long it will take to patch Absinthe for compatibility with the new build, or if it will even be vulnerable to the exploit. Stefan Esser commented on Twitter that he felt it was “highly unlikely that Apple released the update due to the JB,” and noted that, “otherwise they would have released the update for all devices.”
More likely this is a bugfix for a glitch specific to the GSM iPhone 4. If this is the case, we can expect to see a compatible jailbreak soon. If Apple, for some reason, decided to do a day-one patch of the exploit on one particular phone, then it could take longer. You can tell if your iPhone 4 is the GSM model it has a Micro-SIM card tray opening on the right antenna band. If the band is smooth, you’ve got the unaffected CDMA model.
Download the older build of iOS 5.1.1 from Apple’s servers. [Direct Link]
Did Apple’s update affect your phone? Let us know in the comments sections below.