Did you even read my post? Downgrade just like you did from 3.55 to 3.41 but instead of using 3.41 PUP, get a OFW 3.40 .PUP on your usb flash drive. I can't confirm that this works with factory service mode tool, but when downgrading with JIG dongle, using OFW 3.40 .pup with .self file, and then use another .self file to get out of service mode. Google 3.50 to 3.41 downgrade files if you want to know what i'm talking about.
Last edited by Mikuuh; 11-26-2012 at 05:30 PM.