Okay, here's the deal. I've got an iPhone 3GS with the old bootrom. And I wanted to update it to 4.1 with a custom firmware. So, of course I got myself the original firmware and used it with redsn0w and that went smoothly .But when I want to reboot it hangs on the Apple logo screen. Okay, I thought I just get in DFU mode and restore with the modified firmware. Now, I get the 1600 error. So, does anybody got an idea what to do to bring my iPhone back to life?