Have fun with your jailbroken iPhone 4/3GS on iOS 4.1. Check for the Cydia icon on your iPhone home screen. Once the process is successfully completed, Quit button will appear on Greenpois0n window. Hit the “Jailbreak!” button and Greenpois0n will start jailbreaking your iPhone 4 or iPhone 3GS. Once you’re into DFU mode, Greepois0n will tell you that your device is ready to jailbreak. * If you think your device is in DFU mode but Greenpois0n is not detecting it, hit the “Prepare to Jailbreak (DFU)” button again. * If you find on screen instructions difficult to follow, we have an easy guide to: put iPhone into DFU Mode. Now hit the “ Prepare to Jailbreak (DFU)” button on the Greepois0n and follow the on screen instructions to put your iPhone 4 / 3GS into DFU mode. Now execute the downloaded Greenpois0n jailbreak (from step 1). But If you depend on unlock, AVOID iOS 4.1, Greepois0n, Limera1n and wait for the PwnageTool to come out (hopefully within a week.) Step 3Ĭonnect your iPhone 4 / 3GS to your computer and turn it off. IPhone 3GS: If you don’t need to unlock iPhone 3GS, simply update to iOS 4.1 via iTunes. How to Update iPhone 4 to iOS 4.1 without updating baseband But If you depend on unlock, follow the guide linked below to update your iPhone 4 to iOS 4.1 without upgrading its baseband: IPhone 4: If you don’t need to unlock iPhone, simply update to iOS 4.1 via iTunes. How to Jailbreak iPhone 4, 3GS with Greenpois0n Step 1 Lets jailbreak iPhone 4 iOS 4.1 and jailbreak iPhone 3GS iOS 4.1 using Greenpois0n jailbreak. We cannot be held responsible if anything goes wrong. Here is how to: update iPhone 4 to iOS 4.1 without updating baseband.ĭisclaimer: This guide is for educational and information purposes only. However, iPhone 4 users can still update to iOS 4.1 without updating baseband using Tinyumbrella.

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