TinyUmbrella has been a really useful tool for folks who have used iOS 9 or older. IOS firmware, thus enabling you to perform a jailbreak on a jailbreakable version that is not being signed any more. Even though it may sound exciting and you may want to try it out right now, the downgrade method does not work any more.
Image: Download Tinyumbrella
Apple hates jailbreaks, which is why it does not want to give its users an option to downgrade iOS to an older version. After iOS 6, Apple stopped providing SHSH blobs for iOS once a new iOS version was released. Apple basically fixed the loophole that helped to downgrade. So yes, TinyUmbrella does not work any more. Well, it can still save your SHSH blobs , but they will not be of any use to you until someone finds iOS firmwares.
Image: Tinyumbrella App Interface
How TinyUmbrella works is really simple. It basically allows you to save your SHSH blobs for currently installed iOS version on your device. Note that it will only save the blobs for the firmware that is still being signed by Apple. These blobs are then used to create an IPSW file that is pre-signed, which means that you could use that file again and again to restore your iOS device to a jailbreakable iOS version. But as mentioned earlier, it does not work now. Users cannot use it to restore to iOS 6.x unless they are using an iPod Touch 4G, iPhone 3GS, iPhone 4, or an iPad 2.
However, you may have heard everyone SHSH blobs. That’s because it is highly possible that a downgrade method can come soon in the future, and the blobs will become useful again. TinyUmbrella has got updated to work with iOS 9 or lower, and developer Semaphore indicates that downgrading may be possible soon.
Use the below link to download and install TinyUmbrella on your computer. Then use the tool to back up the SHSH blobs on your iOS device.