i was in 3.55 ofw and used 3.41 with dongle before that
i tried with 3.55 ofw and 3.41 ofw and 3.55 cfw and rogero 3.1 but it wont work
tell me please how to dump the flash to upload it to you
Did you use the lv2diag (Step1) file with the PUP on the USB drive or just the PUP?
Tried to re-enter FSM with your downgrade dongle?