I’m sure I didn’t do nuttin’. Yesterday my C001 stopped communicating. I checked it a few hours later. It starts up, blinks red, then blinks: Red orange orange orange for a while. Then changes to Red red red. I took it for a ride in the car to see if it was just my location that lost cellular, but doesn’t seem to be the case. Tested another C001 that was reliable, too. And it can’t pick up cellular, either.
Strange - can you PM device IDs and more details? We can check sw version etc.
Did you try power cycling? We have one known issue when the modem misbehaves and we don’t always power cycle it to recover.