@flohack Hello , Sir ! I ' m in China , and I can ＇ t make calls using China Telecom ' S 4G. Do I need to test the basic communication functions of each operating network

@flohack My device is stil the
stable version OTA21

@flohack Hello , Sir ! The device I use is oneplus5, which consumes a lot of power on the experience , more than android , why ?