Apple has pushed a minor update to iPhone 4 GSM users across the world. The changes that were made in this new update are still unclear.
Apple recently pushed iOS 5.1 update to all the iOS5 users across the world and now, it has pushed a device specific update for iPhone 4 GSM users. The changes that are coming along with this new update is stil unclear, and this has come right in time of Absinthe untethered jailbreak utility for iOS devices.
While hackers are advising the jailbreak users from this new update, if you are fine with losing your jailbreak, you can just go ahead and install this update on your iPhone 4 via OTA or via iTunes. The build number is 9B208 and you can grab a copy of this build via direct download here.
Source: TNW