China Beidou so cattle, why the phone still uses the United States GPS
National Science and Technology
There is a tall club in the world. With only four members, it attracts the attention of heads of state and the research of many top scientists. The club is the GNSS (Global Navigation Satellite System). The four members are the United States GPS, Europe. Galileo GALILEO, GLONASS GLONASS, COMPASS China. While China's Beidou system has developed to the present, some of its performance has surpassed that of foreign countries and the United States and Russia. So, China's Beidou system is so advanced, but mobile phone positioning still uses US GPS? Why did China clench teeth to develop Beidou? What systems in the BeiDou system surpass the U.S. and Russian technologies and make the U.S. hated it?