Hello friends today I am talking about a awesome and realy amazing smartphone.Least start.This phone come with dual mono speaker and the sound quality is very good.u can use loudespkear.This device come with Android4.4 and cyanogenos os so it very easy to use.Build design the oneplus one falls in phablet territory measuring 152.9* 75.9mm with 8.9mm thickness.the phone looks sleek and despite weigning 162grm.it doesh`t feel very bulky thanks to the optimum weight to dimension ratio.Other features- OnePlus one has at.5 inch 1080p IPS full HD screen, Resolution 1080* 1920, pixel 401 PPI, 2.5GHz quad core Snapdragon 801 processes, with adreno 330GPU, 3GB Ram and 64GB internal storage, 13mp rear camera and 5mp font camera, 3100mah battery, 1.Excelent performance2.Bright and vivid display3.highly customizable4.good camera5.good sound quality