I also have issue with O2 and fmms.
However I had the issue after the fmms upgrade to version 1.0.x
Before then it worked (mostly)
I don't think it's PR1.2 that has broken it, however ... maybe some of the libs were needed with fmms1.0.0 so possibly related?
I have removed fAPN (and not reinstalled since PR1.2 clean flash) as I believe it is not required anymore.