How to Jailbreak iPhone OS 4.0 with Redsn0w 0.9.5

Finally, the first jailbreak for iPhone OS 4.0 has been made public. An updated version of redsn0w, version 0.9.5 has been released for Mac, which jailbreaks iPhone OS 4.0 Beta 1 on an iPhone 3G only.

iPhone OS 4.0 jailbreak

This jailbreak is not recommended for novice users, but only for developers. To use it, you’ll need an activated iPhone 3G ( don’t try this on iPhones which require carrier unlock! ), and a developer UDID from Apple.

I won’t be able to write a guide on this jailbreak because my iPhone requires a carrier unlock so here are the instructions from the iPhone Dev Team wiki:

  • Make sure you’ve already activated your iPhone3G with iTunes and your developer UDID
  • Launch the beta redsn0w 0.9.5
  • Select your stock iPhone1,2_4.0_8A230m_Restore.ipsw file (you’ve already used this to update your iPhone3G to 4.0beta1)
  • Select “Install Cydia” and click “Next”. Use DFU mode to install the jailbreak.
  • When your iPhone3G comes back up, you’ll notice Cydia has a blank white icon (we told you many things were broken right now!) You’ll also notice Cydia has no sources. Go to the Sources panel and add this repo: (be sure you have a carrier or wifi signal first!). When Cydia restarts, you should see its real logo now, and the standard sources should be ready to use.

Download redns0w 0.9.5 here.

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