Download a Custom firmware iOS 4.3.1 restore untethered Jailbroken and Activated using PwnageTool 4.3 for iPhone 4, iPhone 3GS, iPad 1, iPod touch 4G, 3G.

Important notes:

• If you have already installed iOS 4.3.1 on your device just use Redsn0w Click Here.
• If you have tethered jailbreak on your device, you can use Redsn0w to make your device untethered.
• If you run iBooty for Windows so you have to use Redsn0w for Windows and the same on Mac.
• You should use custom ipsw if you want to keep your lower baseband on iOS 4.3.1.
• If you rely on ultrasn0w unlock you MUST stay away from upgrading to iOS 4.3.1 untill dev-team upgrade ultrasn0w to work on iOS 4.3.1 on the unlockable basebands

iPhone 4

• Download iPhone 4 iOS 4.3.1 Custom ipsw untethered - Activated ( for users who are not on official carrier SIM card)
• Dwonload iPhone 4 iOS 4.3.1 Custom ipsw untethered - Unactivated (for users who are on official carrier SIM card)

iPhone 3GS

• Download iPhone 3GS iOS 4.3.1 Custom ipsw untethered - Activated ( for users who are not on official carrier SIM card)
• Download iPhone 3GS iOS 4.3.1 Custom ipsw untethered - unactivated (for users who are on official carrier SIM card)

iPad 1 (first generation)

• Download iPad 1 iOS 4.3.1 Custom ipsw untethered

iPod Touch 4G:

• Download iPod Touch 4G iOS 4.3.1 Custom ipsw untethered

iPod Touch 3G:

• Download iPod Touch 3G iOS 4.3.1 Custom ipsw untethered

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