Jailbreak iOS 4.2.1 step by step guide

November 24th, 2010 by Mobile Blog Team | 5 Comments | Filed in Apple

Redsn0w jailbreak

The iPhone-Dev team today released an updated version of Redsn0w that can be used to jailbreak iOS 4.2.1. The new Redsn0w 0.9.6 b4 enables iOS 4.2.1 jailbreak on iPhone, iPod Touch and iPad. It is based on Geohot’s iboot exploit in Limera1n, and is a tethered jailbreak. So if you are rebooting your jailbroken idevice, you should be near a PC or Mac to take it to the jailbreak mode. However, Redsn0w 0.9.6 b4 support un-tethered jailbreak on iPhone models with old iBoot ROM and in iPod Touch 2G models. So until someone releases a complete working untethered jailbreak for iOS 4.2, Redsn0w 0.9.6 b4 is the only option to get Cydia working in your device. Follow our step by step guide to jailbreak iOS 4.2.1 using Redsn0w.
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