TinyUmbrella is a small and useful utility for iPhone users running iOS that can revert your phone's firmware to a previous version. It does so by saving SHSH blobs to the device.
While running jailbreak on different models of iPhone is possible, things can also go wrong which usually would turn your shiny Apple device into what people call "a brick" -- a useless piece of hardware. This makes it necessary to revert the phone back to its previous state.
With the ability to reverse jailbreak iOS devices, TinyUmbrella is a third party device that gets the job done. Note the update time of this application, which means it might not be able to help out with the newest iPhone.
The way that TinyUmbrella works is a bit complicated, but in a word: the application retrieves the firmware (SHSH and blobs) and saves it to Cydia which means it can be used in the future.
It's very important to note that application such as TinyUmbrella or iFaith are for advanced and intermediate users so get a good guide going before attempting to make any modifications to Apple firmware.
TinyUmbrella 9.3.4 on 32-bit and 64-bit PCs
This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from iphone tools without restrictions. TinyUmbrella 9.3.4 is available to all software users as a free download for Windows.