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Starlink Direct to Cell
(direct.starlink.com)
This is a most excellent place for technology news and articles.
Actually, because its line of sight the transmitters not need be super powerful. I am an amateur radio operator and the sats i can talk to in LEO use like 100mW (0.1W) transmitters and we can pick them up. The biggest proble.m really is that the satellite needs a large antenna to pick up the phone. The higher the frequency they use the smaller the antennas on the sats can be.