![]() Note: If you rely on unlock, don’t update you device to iOS 4.2.1 otherwise you’ll lose carrier unlock and there is no unlock available for iOS 4.1 and above yet. Use the IPSW file that you have downloaded in Step 1. Step 2) Using iTunes 10.1, Update/Restore your iOS device to iOS 4.2.1. Download links are given at the end of this post. Download it according to your iOS device. After you receive the DONE message, close Redsn0w and enjoy jailbroken iPhone on iOS 4.2.1. Follow the step by step instructions posted below to jailbreak iOS 4.2.1 with Redsn0w 0.9.6b4: Step 1) Download iOS 4.2.1. Step 10: Wait a few seconds for redsn0w to do its thing. Step 9: Follow the Redsnow on-screen instructions to put the iPhone into DFU mode. Step 8: Switch off your phone and connect it with the PC before you proceed. You can also select any other option if available. Step 7: Now check the Install Cydia Option. Step 6: Press the Next button after Redsnow identifies the IPSW file successfully. Since Cydia included in this version of Redsn0w is not compatible with iOS 4.2.1, you can use the following steps to install a patched version of Cydia. The first it worked OK, but it kept going. (Please make it sure that you selected the iOS 4.1 IPSW file in this step). The recently released Redsn0w 0.9.6b3 can jailbreak all iOS based devices including the new A4 devices like iPhone 4, iPad and iPod touch 4G. iOS 4.2.1 isnt the latest version of iOS anymore, but that doesnt mean some of you arent still running it and may benefit from jailbreak instructions. Wirelessly posted (Mozilla/5.0 (iPod U CPU iPhone OS 41 like Mac OS X en-gb) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7) I've attempted to jailbreak my iPod Touch 2G Non-MC a couple of times now on 4.2.1. Step 5: Start the Redsnow jailbreak tool and open the iOS 4.1 in it to star the jailbreak process. Step 4: Using the iTunes 10.1, update/restore your phone to iOS 4.2.1 GM downloaded in step 1. Step 1: Download iOS 4.2.1 GM (links to downloads or download pages are listed at the bottom of this post). If you have already updated your idevice to iOS 4.2.1 and now want to downgrade it to previous versions like iOS 4.1, 4.0.1, 4.0.2, head over to this post for more details. Unlockers and those who don’t know how to install jailbreak-apps via SSH should keep themselves away from all this stuff because there is no unlock available for iOS 4.2.1 yet and Cydia app is still broken on this version of iOS. Redsn0w doesn’t support the iPad because Redsnow 0.9.6 b2 version, which we are using in this guide, was released to jailbreak upto iOS 4.1 and as you know iOS 4.1 is compatible with iPhone and iPod models, that’s why Redsnow can’t jailbreak iPad on iOS 4.2.1.įollow these simple steps to jailbreak iPhone 4 running on iOS 4.2.1 GM. iOS 9.3.5 Released, Here are Direct Download Links.Direct Download Links of Latest iOS / iPSW Files for iPhone, iPad and iPod Touch.Download Links for iOS 8.3 and iOS 8.4 for iPhone and iPad. ![]() You may also like to read the following posts:
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