I was thinking of switching back to the 4.0.0013 RIL and installing the 11.69.3504 radio to see if I get the freezes again. Or maybe someone else has already tried that combination?
I reinstalled the older radio over the weekend and haven't had any freezes with it either. It seems it's just a combination of the 11.69.3504 radio/4.0.0013 RIL that was the problem?