From the thread : http://www.ifans.com/forums/showthread.php?t=279223 ownerofspam states: What if we did this and then used ECID Grabber to get the ECID while it is stuck in DFU mode then use Umbrella to generate an SHSH file based on the 3.1.2 ECID. Its pretty late now where I am so I have not tested this. I plan on trying tomorrow. I will post back with results. Please feel free to try this yourself and post back with your results as well. Thanks for your time.