![]() ![]() Download iOS 4.2.1 for iPhone 3GS or 3G.Ģ. If you are using iPhone 4/3GS/3G and not relying on carrier unlock, then follow the instructions posted here in order to jailbreak.įollow the instructions posted below to update your iPhone 3GS or 3G to 06.15.00 baseband and jailbreak it on iOS 4.1 /4.2.1.ġ. Note: This release of Redsn0w is only targeted for iPhone 3GS & 3G users on iOS 4.1 / 4.2.1 who rely on a carrier unlock. You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that). Starting with FW 4.2.1 if you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail).If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).You’ll be voiding your warranty in a very obvious way. There is no way to come back down from 06.15, and there’s no hiding the baseband version from Apple.You don’t want your battery to die during the flash process! Risks involved If you do flash your baseband via redsn0w, please keep it plugged into USB the whole time. Note that if you are using RedSn0w on Windows, you would need to run in Windows XP compatibility mode on Vista & Windows 7. ![]() You just need to have stock firmware for iOS 4.2.1 for respective devices. This is very similar to PwnageTool 4.1.3, but works on both Mac and Windows.īut the good news is that, unlike PwnageTool 4.1.3, iPad 3.2.2 firmware is not required for redsn0w 0.9.6b5 as it fetches iPad iOS 3.2.2 right from Apple servers. Step 8: Now from here onwards, whenever you want to do anything related to jailbreak like SSHing into your device, or running Cydia, you must first run your device in the so called “jailbroken state” on every reboot by using “Just boot tethered right now” option in Redsn0w.The iPhone dev team have released Redsn0w 0.9.6b5 for Mac & Windows which lets you to flash iPad baseband 06.15.00 on iPhone 3G & iPhone 3GS on iOS 4.1.2 or iOS 4.1 stuck at 05.15.04 & 05.14.04 baseband. For iPhone 4, 3GS (New Bootrom), iPod touch 4G / 3G / 2G, iPad ONLY: Once done, your iPhone or iPod touch will restart automatically and you will find it jailbroken on the latest iOS 4.2.1 firmware. Step 7: Wait for Redsn0w to do the rest for you. Hold “Power” button for 3 seconds, without releasing power button, hold the “Home” button for 10 seconds and release power button but keep holding Home button for another 30 seconds. You will now need to put the device in DFU mode. Step 6: Turn off your device and connect your device to the computer. Step 5: Now select “ Install Cydia” and click “ Next”. Step 4: Start Redsn0w 0.9.6b4 and point it to iOS 4.2.1 firmware to proceed with the jailbreak. Step 3: Download Redsn0w 0.9.6b4 for Windows / Mac Step 2: Update/Restore to iOS 4.2.1 firmware using the IPSW file you just downloaded via iTunes 10.1. Step 1: Download iOS 4.2.1 for your version of iOS device. How to Jailbreak iOS 4.2.1 using Redsn0w 0.9.6b4 Also, if you rely on the ultrasn0w unlock, this jailbreak is not for you and hence you need to wait for now. In case you prefer untethered jailbreak, wait for an updated version of JailbreakMe. Old devices like iPhone 3GS (old bootrom), iPhone 3G and iPod touch 2G (Non-MC Model) can be jailbroken-untethered right now using this latest version of Redsn0w. The tethered jailbreak condition in Redsn0w 0.9.6b4 however only applies to the new devices like: iPhone 3GS (new bootrom), iPhone 4, iPad, iPod touch 2G (MC Model), iPod touch 3G and the iPod touch 4G. The iPhone dev team has already released RedSn0w 0.9.6b4, based on Geohot’s Limera1n bootrom exploit, which brings first proper jailbreak, with working Cydia for all iOS 4.2.1 devices.Ī major negative about going for Redsn0w 0.9.6b4 is that it is tethered jailbreak which means you will need to rejailbreak it everytime the device is rebooted (just like Blackra1n). ![]()
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