Apple is currently signing the iOS 6.0.x firmware meaning that you can save your SHSH Blobs even if you lost them due to the now resolved issue with Cydia blob saving. Of course, even better, if you don't have a jailbreak this is your window of opportunity to downgrade!
You can find more information about downgrading here. Follow the tutorials linked below for instructions on how to save your SHSH blobs.
Save Your SHSH Blobs With Tiny Umbrella:
● Windows
● Mac
Save Your SHSH Blobs With iSHSHit
● iOS
Note: SHSH Blobs are only useful for A4 devices at this point in time; however, it's always a good idea to save them in case a way to use them is found in the future.
Update:
It appears the window has already been closed.
You can find more information about downgrading here. Follow the tutorials linked below for instructions on how to save your SHSH blobs.
Save Your SHSH Blobs With Tiny Umbrella:
● Windows
● Mac
Save Your SHSH Blobs With iSHSHit
● iOS
Note: SHSH Blobs are only useful for A4 devices at this point in time; however, it's always a good idea to save them in case a way to use them is found in the future.
Update:
It appears the window has already been closed.