After some googling: yes, there are / will be external comm devices and some future chipsets will support this functionality. Qualcomm, Motorola, and Iphone. Initially for messaging only, but still a gamechanger in many ways.
This is technology to track the poor.
It will replace satellite messengers and satellite phones.
Sure, at first. That's certainly not the end goal. VoIP works well enough for now that I'm still able to work and communicate just fine.
It might be possible to have mobile internet terminals, like a satellite hotspot. I hope Starlink comes out with something like that.
I find interesting that it will be like 1G cell phone.
https://www.nasa.gov/sites/default/files/thumbnails/image/ja...
Furthermore, the cell towers have very limited range; usually just a few miles. Past the edges of the urban and suburban areas there will be nobody at all using those frequency bands except for a few lonely phones repeatedly asking for service and getting no reply. A satellite provider could easily provide regular phone service to thousands of users across a huge, sparsely–populated area where cell phone towers are few and far between.
Will mobile VPNs be able to block their GEO locations?
If you can cause the citizenry to get riled up against whichever government is threatening to regulate your endeavors into oblivion, then you can use it as a threat to prevent governments from doing that.
Lock down internet so only twitter works for free?
It wasn't his reason, then.