Panasonic P55 Novo is an amazing mobile phone. The device functions on Android v6.0(Marshmallow) Operating System, and for powerful performance, Panasonic P55 Novo 4G VoLTE comes with combination of 1.3 GHz Octa Core processors. Excellent rear camera, selfi camera is not good but has led flash. Display is very nice and HD. Speaker sound is not loud but good. Call sound is clear. Not OTG support.