Jared Busch provides us with a full review of the Xiaomi MI4 smartphone running MIUI V6 Android 4.4.4 KitKat. It features a solid build, 5 inch 1080p LCD display, new software features, Sony cameras on the front and rear and a solid 3080mAh battery. But can it compete for your dollar against the other giants like Samsung, LG and HTC?