Yesterday i downgraded from 1.1.1 to 1.02 and successfully activated my iphone.
I couldnt unlock it, so i thought I should restore again to 1.02 and then try again.
The problem is that i get an 1013 error in itunes, and now it stays in the yellow triangle screen.
I also tried restoring with the "pushing the on off button and release it" restore mode and i get an error 1 message.
I tried with both 1.02 and 1.1.1 firmwares, the same thing happens.