Users who currently use an older IOS version are advised to update to IOS 5.0.1 and then jailbreak untethered to perform with redsn0w 0.9.10b1 (Mac OS X and Windows). If you depend on an unofficial unlock this you a custom firmware to do with redsn0w, PwnageTool or sn0wbreeze . If you are already a tethered or semi-tethered jailbreak your computer from iOS 5.0.1, you can search by corona in either Cydia version of redsn0w 0.9.10b1 use, where you Install Cydia checkbox to off. If you've already tried to downgrade from 5.0.1 to iOS iOS 5.0 without ShSh blobs, then you are advised to restore to the official version of iOS 5.0.1 before the jailbreak from trying to run.
The untether pod2g of the third and fourth generation iDevices uses limera1n -exploit of geohot with two different exploits and a number of tricks. Since the iPhone 4S and the iPad 2 is not vulnerable to the exploit-limera1n, further exploits this iDevices also necessary to be able to jailbreak. Users who are waiting for a jailbreak of the iPhone 4S and / or the iPad 2 do well in the short term update to iOS 5.0.1 (and using tiny umbrella SHSHs of the store) and iOS 5.0.2 or 5.1 is to pass up if they are made available by Apple.
To ensure that in future you can stay on iOS 5.0.1 jailbreak is advisable to charge the necessary files (ShSh blobs) as soon as possible with tiny umbrella store (even if you still do not want to jailbreak or from can perform).