Hi friends what a clear sound quality best ever. stock android and interface its very simple to use. metal body with great finish made this design perfect.Great features dual sim support, 4gb ram, main feature is 5000mah big battery make this device powerful, 6 inches big screen for reading, best camera 16 top. the a9 pro makes use of the same super amoled tech. it has a 6-inchfull hd display of 1080*1920 pixel reslution with about 360pix density and corning gorilla glass 4 coating? ` `this is a very good phone no hanging problems like ither phone. its very good phone