Now we have great news for all users with A4 devices that recently updated their devices to newest iOS 5.1.1 firmware.
To fix downgrading bugs, Dev Team has released an updated Redsn0w version — Redsn0w 0.9.11b4. Updated redsn0w tool is available for download from the links posted below.
The Dev Team has definitely been active over the past weekend. The updated — Redsn0w 0.9.11b4 supports iOS 5.1.1 tethered jailbreak for the devices with A4 chip, new mode of suturing the corrected certificate and the ability to create custom iOS 5.1.1 IPSW file without increasing your baseband.
Unlock iOS 5.1.1 iPhone 4 / iPhone 4S (preserved baseband)
The baseband of iPhone 4 and iPhone 3GS (for Gevey sim and ultrasn0w fixer users) can be preserved wit creating custom iOS 5.1.1 firmware. Аfter the official presentation of the newest iOS 5.1.1 we informed you that iPhone 4S can be unlocked with Gevey Ultra S.
Download Redsn0w 0.9.11b4
Keep in mind to hit the comment section below if you have any questions.