Build quality is realy good it has an ir blaster I control my home devices from my phone there is only one speaker but it is realy realy loud its screen quality is verry good the screen is visible in day light the call quality is verry nice audio out put of head phone is out standinf the finger print scaner is not fast it is slow multi tasking is verry good the ram management of thi is verry good I played heavy games on it it worked awesome battery life is awesome around one day the dual camera works well in day light condition but not in low light condition the video is taking time to focus it does not support FM its charging speed is around 1.45min which is not bad I like this device