TinyUmbrella is widely used by many, predominantly in the jailbreak community to save their SHSH blobs. To put it simply, if you don’t save your SHSH and Apple stops signing for that particular firmware, you won’t be able to restore your iPhone to older firmware versions through iTunes…
Although Cydia automatically saves a users SHSH blob onto their TSS server, the advantage TinyUmbrella has over Cydia, is that TinyUmbrella does not require the device to be jailbroken. Using both Cydia and TinyUmbrella are effective and safe ways to save the SHSH of your device. However in the unlikely event that Cydia’s TSS server goes down, TinyUmbrella will to allow you to restore to older an iOS firmware locally through iTunes.
Although a chunk of the update consists of compatibility for iOS 5 Beta 2, another modification has been made to the look of the actual application.
TinyUmbrella has now been resized to a 670 px vertical size. For some this may not seem like a big deal, but as a Macbook Air user myself, its nice that the application has been adapted and now fits within the screen without having the bottom sections unaccessible. This modification will have mixed reactions for some, but I personally welcome it.
As a reminder, to save the your SHSH blobs that Apple is currently signing, you’ll need to open TinyUmbrella, click the Advanced options tab and uncheck ‘Request SHSH from Cydia’ and click ‘Apply Changes’. Although not necessary, I make it a habit of quitting the application and restarting after I have made any changes to the settings.
TinyUmbrella also looks to be undergoing further development to combat Apple’s initiatives to prevent restores to older firmwares in iOS 5, as discovered by the iPhone Dev Team.
semiphore mentions on his blog:
“Despite what looks like disdain and apathy, I /AM/ working on a couple things given the changes coming for SHSHs. Save those SHSHs!”
Although it remains to be seen as to what will be implemented in future updates, it looks like the game of cat and mouse will still continue between the jailbreak community and Apple.
You can download the latest version of TinyUmbrella here.
For those of you with an iPhone 4 CDMA, TinyUmbrella has been updated again to 5.00.02. The reason is due to an error in the save filename of the 5.0b2 SHSH file. Simply update TinyUmbrella to 5.00.02 and make sure the Overwrite SHSH option is selected!