i upgraded to ios 4 i didnt like it so tryed going back down to 3.1.3 and pressed **** and then restore, choose the 3.1.3 fw it came up with an error afterwards so tryed agaian then the phone just went to a blank screen and stayed there for ages, so i unplugged the phone from usb and had to alt+ctl+del itunes and now the phone comes up with the itunes and usb cable icon and itunes wont see the phone. the pc makes the noise to say plugged in and unpluuged. i have tryed the dfu thing and just comes to this screen no matter what i do itunes will not see the phone. What can i do to fix this? is it now 100% dead? is it bricked?