iFaith is a new SHSH dumping tool for all iOS devices which lets you save SHSH blobs an old firmware currently running on your iPhone, iPad or iPod Touch even if it’s not being signed by Apple. iFaith is developed by iH8Sn0w, the dev behind Sn0wbreeze, f0recast and iREB.
SHSH blobs are necessary to downgrade firmware, without these SHSH blobs you can not restore a firmware which is not being signed by Apple and once Apple stops signing a firmware, you cannot save SHSH blobs for it. This is where iFaith comes in. Using iFaith, you can save SHSH blobs for an old firmware running on your iDevice even if Apple has stopped signing it. iFaith not only backup SHSH blobs, it can also build custom .IPSW using those blobs.
iFaith supports: iPhone 4, iPhone 3GS, iPod touch 4G, iPod touch 3G, iPad and the Apple TV 2G (Devices vulnerable to Limera1n jailbreak exploit). iPad 2 is not supported.
These are the steps to save SHSH blobs of an old firmware currently running on your iPhone, iPad and iPod Touch using iFaith…
Step 1
Download iFaith for Windows [Mirror 1] [Mirror 2]
Download iFaith for Mac [Coming Soon!]
Step Two
Extract the downloaded zip file, and double click the iFaith.exe file.
Step Three
A disclaimer will appear. Read the notice and click ok to proceed.
Step Four
Click the Dump SHSH Blobs button
Step Five
Read the information and click Proceed when you are ready.
Finally, click the Let's Go! button to start the dumping process.
Step Six
If you are dumping an Apple TV 2, indicate it when iFaith asks you
Step Seven
Follow the DFU Instructions to place your device in DFU Mode. You can find more on entering DFU mode here.
Press Power and home for 10 Seconds
Release the power button, but keep holding the Home
Once Successful, iFaith will dump the SHSH of your current firmware. It will go through each step which could take a few minutes.
Step Eight
When completed, iFaith will ask you where to locally save the SHSH.
Indicate where you want to save the SHSH file.
Step Nine
iFaith will notify you that the process was successful 
**Thanks goes to ih8sn0w and everyone else who helped in making this tool.
