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iOS 4.2.1 Jailbreak released

New Firmware, New Jailbreak. Following yesterday’s release of iOS 4.2.1, redsn0w 0.9.6b4 is now available to jailbreak it. There are some conditions attached, so best read the post at the iPhone Dev Team Blog before attempting the jailbreak.

Another thing to remember is that this is still beta software, so may not work as expected. I followed the instructions the app gives to enter DFU mode, but found redsn0w stopped at the waiting for reboot screen. I got around this problem by putting my iPhone 3GS into DFU mode manually before running redsn0w, then pressing the power button when redsn0w stopped at waiting for reboot.

Once Jailbroken, there are a few more issues. SB settings isn’t currently working for me, and crashes springboard when I try to use it. No doubt this will be quickly fixed, but for now just remember this is new software, so either wait for the jailbreak ecosystem to catch up or enjoy the ride.

Update 25th November – Cydia updated SBsettings Toggles today, and SBsettings is now working perfectly with 4.2.1 on my 3GS.

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