Hi, I'm trying to extract blobs from an iPhone 4 8GB recently bought, has 6.1.2 and is an MD128A/B. I wanted to set up a restore path to 6.1.2 before jailbreaking it so I can tether. I have tried 3 different Win 7 PCs (32 and 64 bit) and have been shutting the application down (edit: using task manager, otherwise it doesn't close on exit) between attempts (per advice from elsewhere), but iFaith always hangs at the iBEC stage. Also tried it with & without SIM installed, no difference. The phone displays a transcript which ends with "Waiting for Client.." then after a few secs the phone seems to reboot (apple on screen) and starts up normally. After a while an error message comes up from iFaith "Unexpected response received from device. Response: "(nothing shown). redsn0w also immediately says helpfully "error with SHSH blobs" if I go into the extracto bit. I have the firewall allowing incoming and outgoing for the .exe, and I have .NET 4 installed. After a lot of searching I can only find a few references to similar problems but no solutions beyond maybe wrong .NET version or just use a different PC. But no clue about which .NET is right. Please advise how to make it work.