So, I hw unlocked my 1.1.2 iphone and downgraded the bl to 3.9. I was in 1.1.1 fw version running the 1.1.1 baseband and I decided to finally upgrade to 1.1.3. So I started by virginizing the iphone. I ran it. everything was fine. it asked me to restore, and I did (which restored to 1.1.3) so now I have the 1.1.3 baseband (4.03) and 1.1.3 firmware. I ran ziphone, and pressed on the jb and activate (unticked the unlock) everything went fine. my phone restarted, but it hadn't been activated (i don't know if it was jb either)