The previous page is sending you to http://www.sizlopedia.com/2011/01/23/untether-ios-4-2-1-jailbreak-using-shsh-blobs-of-ios-4-1-instead-of-ios4-2b3-using-next-redsn0w-0-9-7-update/.

 If you do not want to visit that page, you can return to the previous page.