Few days back Chronic Dev Team had released Greenpois0n RC5 untethered 4.2.1 jailbreak on all idevices. Unfortunately it was only for Mac OS X and Windows version is yet to be made available. Now here is good news for Windows users finally Chronic Dev team has released Greenpois0n RC5 for Windows.
Greenpois0n RC5 B2 for Windows is released & lets you to untethered jailbreak ios 4.2.1 and supports following devices,
– iPod Touch 2G (all bootroms)
– iPod Touch 3G
– iPod Touch 4G
– iPad 1G
– iPhone 3Gs (all bootroms)
– iPhone 4
– iPhone 4 Verizon (_not_tested_)
– ___AppleTV 2___ (support will be added in RC6)
If you don’t rely on unlock then only you should proceed for Greenpois0n untethered iOS 4.2.1 jailbreak. Note: if your device is jailbroken with iPhone Dev Team’s Monte, please restore to fresh 4.2.1 first and then use Greenpois0n RC5 to untethered jailbreak.