download link: http://transfersend.com/KataQuintano957/Firmware iOS firmware 4.2.1 jailbreak with RedSn0w 0.9.6b4 tethered for iPhone 3G, iPhone 3GS, iPhone 4, iPod Touch 2nd gen, ipod touch 3rd gen, ipod touch 4th gen, iPad, iPad 3G. Tethered for : - iPhone 4 - iPhone 3GS new bootrom - iPod touch 3rd / 4th * iPod touch 2nd MC NOT SUPPORTED (downgrade to 4.0 then use jailbreakme) Fully untethered & working: - iPhone 3GS old bootrom - Non MC iPod touch 2nd gen - iPhone 3G DevTeam Note : - "Tethered" does not mean you cannot boot at all without PC/Mac assistance. If you have not installed any tweaks that hook into important programs like SpringBoard or CommCenter, your device will actually boot. However, jailbreak programs like Cydia won't work (and Cydia may still have a white icon). Also, certain built-in apps that had to be moved by Cydia will fail (Safari being the most noticeable example). - If you've installed MobileSubstrate tweaks that hook into SpringBoard or other important programs, your boot will actually fail (you'll get stuck at the Apple logo). You need to use redsn0w to "Just boot tethered right now".