NTN 3GPP Specs are only now being properly evaluated and set, with Ericsson/Qualcomm/Thales partnering to POC the tech on a 5 year roadmap.

In the interim, a number of companies like Apple and Samsung are now offering Satellite based SOS Emergency Text services as a commercial reality, presumably straining the capabilities of the current modems to their capacity.

Cellular is specced and regulated to the extreme between the FCC/3GPP Standards, but working within those constraints you already have two viable D2D Satellite 4G companies rolling out commercial services for unmodified cellular devices - ASTS and Lynk - with Lynk already offering commercial services.

They could well be optimizing and revolutionizing in one go - particularly to support new paradigm shifts in the US Market Service provisionment.

https://www.businesswire.com/news/home/20240529554741/en/AST...