I thought I could simply DFU restore the unlocked 1.1.1 upgraded from 1.0.2OTB to 1.1.3. It went through the restore fine and Ziphone was able to unlock/activate/jailbreak the phone. However, it has No Service. The problem as I read from the forum seems to be 04.04.05_G modem firmware. I am puzzled since most people having the same baseband are running fine with other SIM. What am I missing here? My bootloader is 3.9. Is it possible to downgrade the 04.04.05 t 04.03 or 04.02?

I would appreciate any suggestion.