iOS 4.3.3 has been released by Apple for iPhone 4, 3GS, iPad, iPod touch 4G/3G to fix the location tracking bug found in iOS 4.x devices. If you have upgraded to iOS 4.3.3, and now want to downgrade back to iOS 4.3.2, iOS 4.3.1, iOS 4.3, or iOS 4.2.1, simply follow the instructions below to downgrade iOS 4.3.3 on iPhone 4, 3GS, iPod touch, iPad 2 and iPad 1 to iOS 4.3.2, iOS 4.3.1, iOS 4.3, iOS 4.2.1. This guide will only work if you have SHSH blobs saved for the respective firmware you downgrading to. Proceed to downgrade guide.
Sn0wBreeze is a jailbreak tool that only works for Windows. The following guide will help you to perform tethered jailbreak for iOS 4.3 on iPhone 4, 3GS, iPod Touch 4G, 3G, iPad 1 using Sn0wBreeze 2.3 b1 (iPad 2 is not supported). Do not upgrade your iDevice to iOS 4.3 if you rely on unlock.