Opoo F1s smart phone is my favourite her sound quality is so quite.i love her design her body slim and simple catching style and button is normal.her skin very good to tuch.every people call opoo is camera phone it is really opoo is a good camera 13 MP with flash . battery capacity 2500 mAh battery Non-removable.this phone so fast running for her 3 GB Ram.os android lollipop Qualcomm MSM8939v2 Snapdragon 616 it is good features.this phone price much higher for me.