> As of June 28, Chinese satellites were observed more frequently than GPS satellites in 130 of 195 countries (U.N. member states plus the Vatican and Palestine). More than 20 BeiDou satellites were observed over mainland China.

I don't get something you have satellites of glonass, gps and beidou what's stopping anyone from getting better accuracy using all 3 at the same time.

because they are independent systems; they cannot communicate triangulation data between themselves

Isn't the triangulation being done on the phone/device GPS chip ? The same chip is doing it for all 3 services. The chip gets the data of the satellite positions and then shows its location in relation to them that how I thought gps/other systems worked.