UPDATED July2011 : this tethered method will work on firmware the new 4.3.4 using new 0.9.8b3 redsn0w! Written guide support : http://tinyurl.com/6cqssbq For iOS 4.3.5 See here (extra step required) : http://tinyurl.com/3exez8x The tethered method this video uses back with 4.2.1 will work with the new 4.3.4 with these new files down below. If you have 4.2.1 DO NOT use this anymore as there is a newer and easier version available for 4.2.1 (see channel for more tutorials). 4.3.4 USERS use these files below and proceed with the same steps. Written Tutorial : http://tinyurl.com/2a9a8q2 iOS 4.3.4 Official Firmwares: http://tinyurl.com/6cqssbq RedSn0w 0.9.8b3 for Windows : http://tinyurl.com/3kxj5rv RedSn0w 0.9.8b3for Mac : http://tinyurl.com/4yqyffb http://twitter.com/iPhoneArena http://facebook.com/iPhoneArena --------------------------- ps* All users relaying on unlock stay away!! this will update your baseband = no unlock. Tethered for : - iPhone 4 - iPhone 3GS new bootrom - iPod touch 3rd / 4th 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". OLD FILES (not needed) RedSn0w for Windows : http://tgq.nl/redsn0w_win_0.9.6b4.zip RedSn0w for MacOSX : http://cdn.nspwn.com/redsn0w_mac_0.9.6b4.zip Official Firmwares : http://tinyurl.com/26qlwnl