As the next iOS 5.1 release is expected in near feature so that it is recommended by Notcom that users who belongs to jailbreak community must save SHSH blobs for iOS 5.0.1, because with the release of new iOS update it would not be possible to save SHSH blobs for old iOS version.
Check also:
How to Save SHSH Blobs with TinyUmbrella
According to official blog:
“With the quiet time between jailbreak and iOS version, make sure you get your SHSHs saved. I’ve been working on the TinyUmbrella rewrite (albeit sparingly due to real life demands). It’s important to make sure you have your 5.0.1 SHSHs tucked away safe. There is no guarantee that we’ll have things this good again.”
Those who are not familiar with TinyUmbrella, this tool works to save SHSH blob for iDevices including iPhone, iPod Touch, iPad and Apple TV from Apple Server and Cydia which are required to downgrade iDevice firmware to an older version.
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