Guide before Testing RedSn0w Untethered iOS 4.2.1 Jailbreak [Must Read]

iPhone Dev Team has just updated their blog with some key points about the testing version of RedSnow which will Untethered Jailbreak iOS 4.2.1. It should be noted that it’s a Testing version not a Public release so only experts should try this.

Here are the key points before proceeding with New Beta RedSn0w Testing Version:

We’re about to release the first beta using this new “backup method”, which redsn0w calls “Jailbreak Monte”.  

Here are some important points:

This is a beta tester program. It’s not a general release!  Things can go very wrong, so please don’t even consider testing if you have pictures or other media on your device that you haven’t backed up!

For the same reason, please don’t participate if you rely on the ultrasn0w carrier unlock.  Wait for the final version!

Until we fix some sandbox issues with bluetooth, the bluetooth functionality is disabled.

This very first beta1 is limited to iPhone4, iPad, and iPod touch 4G.

Cydia must have your 4.2b3 SHSH blobs saved on file.  (As we approach a general release, we’ll provide a way to let you use locally saved hashes too).

You must already have the usbmuxd software installed and running on your Mac (this requirement will eventually go away too). The correct invocation of the relay is just as that page says: “./tcprelay.py -t 22:2222”.

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