An almost downgrade from apple (I tried - failure - 1013 Error Message.
Read here, at the end of the page
apple phone support told me to put my phone in restore mode, try this? first you plug in usb, then you hold the top button and the front button for 10 seconds, then let go of the top button and keep holding the front one until itunes recognizes the phone. it worked for me when my 1.0.2 was locked up? you don't see anything on the screen until the restore starts.
I did this, it starts itunes I shift+click restore, select 1.02 firmware. It starts doing the restore as normal. As it finishes, it says "the iphone could not be restored. An unknown error occurer (1013). Then the iphoen restarts, and loads the old restore mode (I believe so, because it shows the Yellow Triangle, instead of the cable-itunes logo).
Even if I restart normally, it comes to this screen instead of the activation screen, so I dont know if it is succesfully restored.