I think these guys have explainers on their site:

https://lynk.world/

Yes, it was not for high bandwidth applications. Nevertheless when you can receive something like SMS it seems possible to locate you phone with similar technology.

Real time voice and data downloads of about 14Mbps from LEO test satellite to unmodified phones by AST Spacemobile.

https://www.theverge.com/2023/9/19/23879527/att-cellular-sat...