I can't speak for Subaru, but I did this on my Toyota last weekend (cell radio, not space radio). The fuse pull on Toyota DCM affected other systems (GPS, microphone). I got a hold of the service manual, identified the cell antenna cables, and simply unplugged them. Now "simply unplugging them" required ripping apart quite a few things and dealing with some annoyingly deep bolts, but it wasn't too terrible.
Pulling the antenna cable is the right move.
Fun fact on car GPS: it actually feeds back through carplay so your navigation gets worse without it. What I have yet to figure out is if the network connection is given to the car through carplay.
Pulling the antenna cable is the right move.
Fun fact on car GPS: it actually feeds back through carplay so your navigation gets worse without it. What I have yet to figure out is if the network connection is given to the car through carplay.