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The following step-by-step instructions will help you jailbreak Jailbreak iOS 4 iPhone 3GS, 3G and iPod touch 2G with PwnageTool 4.0 / 4.01

Step 1: Download and install the latest version of iTunes.(Download iTunes 9.2 for Windows and Mac OS X)

Step 2: Now start iTunes and sync your iPhone with your PC so that it backs-up all your important data including settings, apps, music, contacts and photos.

Step 3: Download PwnageTool…