I’m out of my depth here, but my research said Tiantong-1 and that that’s geostationary. Adding the keyword BeiDou I do get a few results too, but it looks like BeiDou is GNSS, so I think those might be errors?
Anyway, my point was just that this stuff isn’t equivalent to Starlink. For what satellite phones do, GEO or whatever similar is fine, but the appeal of Starlink certainly requires that it be LEO.