How to Check Which SHSH you Have Saved with TinyUmbrella
I just wanted to do a quick write-up on how to check TinyUmbrella to see what SHSH you have saved. Many times when people upgrade their firmware to a firmware that does not have an untethered jailbreak available they want to downgrade.
Unfortunately, more times than not, this person will not even know what an SHSH is or if they do know what it is, they won't know how to save it or how to check if they already have it saved.
The first thing you want to do is download the latest TinyUmbrella from The Firmware Umbrella - TinyUmbrella Next you want to open TinyUmbrella and go to the "Advanced" tab and check the box that says "Request SHSH from Cydia"
Now that you've done that, connect your device if it's not already connected. You will see the device listed in the left-hand pane. Highlight it and then click the "Save SHSH button"
Now go back to the "General" tab and you will see a list of all the available SHSHs you have saved for that particular device. Using the TSS Server that is built in to TinyUmbrella you can bypass iTunes verification servers and downgrade to any firmware for which you have the SHSH saved.
*IMPORTANT* After doing this, make sure to go back to the "Advanced" tab and uncheck the "Request SHSH from Cydia" box. If you don't do this, TinyUmbrella will not save future SHSH keys when you click "Save SHSH."