You can jailbreak to 4.3 iOS GM

You can jailbreak the 4.3 version of IOS GM

Has been rapid, hackers have modified the tools to be able to jailbreak the latest "beta" firmware from Apple. It is through a custom firmware, so you have to restore.

Also this is a jailbreak tethered, with the consequent use of the Redsn0w restart whenever you want (including the first time, do not forget because my first start but will not work Cydia).

News From iPhone jailbreak not recommend GM versions, since they are not definitive, but if you decide to do you know that is only recommended for experienced users.

Here's the tutorial .