Previously, I posted How to Jailbreak iPod Touch 3.1.2 & iPhone 3.1.2 with BlackRa1n.Now as the latest firmware iPhone OS 3.1.3 has been released this year in January 2010 as it also a minor update for iPhone 2G/3G/3GS, iPod Touch 2G/3G, The old jailbreak method with BlackRa1n does not work on this latest firmware.So here's how Jailbreak iPhone 3G/ 3GS 3.1.3 with Redsn0w 0.9.4.
The old version Redsn0w 0.9.3 beta is only working on iPhone 2G, not on 3G or 3Gs.So here is the latest version to jailbreak iPhone or iPod touch with 3.1.3 Firmware and it is released by iPhone Dev Team.Note that this can only jailbreak the iPhone, It can't unlock the iPhone 3G/ 3GS 3.1.3 OS.
How to Download & Jailbreak iPhone 3G/ 3GS 3.1.3 with Redsn0w 0.9.4:
Here are two versions of Redsn0w 0.9.4 you can download.One for Windows and one for Mac users.So, go ahead and Download Redsn0w 0.9.4 for Windows or Redsn0w 0.9.4 for Mac.
Now what is the exact full process of jailbreak iPhone 3G/ 3Gs 3.1.3 OS? You don't have to worry at all! RedmondPie has the full detailed step by step Guide for it and also the all tools to you might need to download.
