X1559984215293 , via OnePlus 6T , Oct 24, 2019 : I am facing all the issues such as 1. calls doesn't hang up even after disconnecting call. 2. there is missed call alert when phone has not even range up. 3. sometime I have to call two three times, only after that called get connected. 4. call drops. Pls help me to know any solution to these.