Same boat here. Picked up my P100D in December, late last week finally got the .36 update. No .120 update yet. The only time the car isn't connected to WiFi is when I'm driving it (WiFi connections at home and work).
A week ago I even put a Wifi Extender in the garage and nothing. Now I decided to turn off WiFi and try LTE. There has to be some reason some vehicles are not getting updates and others are but no one has any answers.