Tinyumbrella is a great tool developed by semaphore for create SHSH blobs of iOS devices and downgrade to older iOS versions. Tinyumbrella 18.104.22.168 beta version is now available for iOS 8.2 downgrade preparation. currently the new beta can only create SHSH blobs of iOS 8 devices. But soon it will update to be capable of downgrade iOS 8 devices. Downgrade iOS is requires due to many reasons and occasions. Our main focus of downgrading iOS 8 device is return back to jailbreakable iOS version on iPhone iPad or iPod. Still you can’t jailbreak iOS 8.2 or iOS 8.1.3 although you created SHSH blobs. but those will be helpful in future.