If you have any questions, concerns or issues just leave a message in the comments. For other iOS devices, redsn0w 0.9.6b5 will simply jailbreak the device but some models will be a tethered jailbreak. Step 7: How to boot tethered jailbroken iDevice (iPhone 4, 3GS (New Bootrom), iPod Touch 4G/3G/2G (MC), iPad) after reboot, select “Just boot tethered right now”. Redsn0w 0.9.6b5 jailbreaks iOS 4.2.1 but also provides the added ability to install baseband firmware that can be unlocked for the iPhone 3GS and iPhone 3G. ![]() After the process is complete, your device will reboot and you now have a jailbroken iOS 4.2.1 iOS device. Step 6: Now sit back and relax while Redsnow does the thing it does best, jailbreak your iOS Device. Step 5: Follow the on-screen instructions. Note: Make sure your device is both OFF and PLUGGED IN to the computer. You can also select the optional choices if you like (read Step 7 for how to boot tethered iDevice). Step 4: Select “ Install Cydia” and click “ Next“. Step 3: Launch RedSn0w and find your way to iOS 4.2.1 and click “ Open”. Step 2: Upgrade/Restore to iOS 4.2.1 via iTunes 10.1 (iPhone users: iOS 4.2.1 will update your baseband which is NOT unlockable right now). Step 1: Download iOS 4.2.1, 4.2 or 4.1 and RedSn0w from the iJailbreak Downloads Section. Update #4: You can now jailbreak and update your iPhone 3GS, 3G to unlock iOS 4.2.1 on baseband 06.15.00 with RedSn0w 0.9.6b5. Update #3: You can jailbreak iOS 4.2.1 untethered using RedSn0w 0.9.7b4. Update #2: iOS 4.2.1 GM is now available and can also be jailbroken with RedSn0w. Update #1: iOS 4.2 GM was released to developers this week and it seems like it can be jailbroken with the current version of RedSnow. ![]() Redsn0w brings tethered jailbreak for the following iDevices: Redsn0w brings untethered jailbreak for the following iDevices: Use PwnageTool. This also requires the new version of iTunes 10.1 to install 4.2 (4.2.1). The current baseband cannot be unlocked at this time, and cannot be downgraded. This jailbreak requires you to upgrade your firmware, via iTunes, which upgrades your baseband. WARNING: If you rely on your iPhone to be unlocked, to use it on an unofficial carrier, you should avoid this jailbreak. This is a complete tutorial which will show you how to jailbreak iOS 4.2.1, 4.2, 4.1 on iPhone 4, 3GS, 3G, iPod Touch 4G, 3G, 2G and iPad using RedSn0w.
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