How to Jailbreak iPhone 4 and iPhone 3GS over iOS 5 with RedSn0w 0.9.9b5

The guide below will work to jailbreak iOS 5 on iPhone 4, and iPhone 3GS with RedSn0w 0.9.9b5. This is a tethered jailbreak that means you always need to attach your iPhone to system for each reboot.

RedSn0w for iOS 5

Jailbreak iOS 5 with RedSn0w 0.9.9b5


  • Update iOS 5 on your iPhone 4 or iPhone 3GS
  • Download RedSn0w 0.9.9b5 for Windows / Mac (At the moment RedSn0w 0.9.9b5 for Windows is not available.)


Unzip RedSn0w 0.9.9b5 file and then double click on Redsn0w application icon


Click “Jailbreak” button on Redsn0w screen


Make sure your iPhone is OFF and plugged into computer, then click Next


Follow the on screen instructions to get your iPhone into DFU mode as:

Hold down the Power (corner) button for 3 seconds

Without releasing Power button hold down Home button for 10 seconds

Release Power button by keep holding Home button for 15 seconds


Wait while your iPhone get reboot


Redsn0w will start preparing jailbreak data


Check mark the box with “Install Cydia” and go Next


Your iPhone will reboot and Redsn0w will start uploading ramdisk, on completion Done! message will appear


Let your iPhone get reboot, on finish it will be jailbroken and Cydia icon will appear on Springboard

How to Boot Tethered


On Redsn0w first screen click on “Extras” button


Click “Just boot” button and that’s it

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