Agree Sat signals easier to receive than send. Location isn’t what I’m concerned about.
Disclosure is. Using terrestrial systems, there can be no real security regarding your location as it currently stands. You could only do it with ubiquitous WiFi and that isn’t going to work very well while your Nav’ing yourself to Grandma’s house 2 states away for Thanksgiving. 
There still isn’t much info regarding Elon’s systems. His phones come with StarLink but I’m clearly making assumptions about how that works exactly.