To my knowledge it is completely offline. The fanciest version of it (Honda Civic) has wifi and will connect to your house wifi when in range (and also do wireless Android Auto) but mine doesn't have it. This one has no cloud features and if there's a SIM card lurking deeply in there somehwere, it certainly isn't going to facilitate reaching down to monitor me in the car (the hardware isn't there, aside from the microphone for bluetooth) or change features on me.
I won't claim to know for certain but want to point out that if there's a SIM card in the head unit then it can upload anything it can see on the CAN bus which is literally every sensor in the vehicle. I guess the only thing likely to be missing is a cockpit video feed.
