In Oppo f1s primary camera not good quality in comparison to secondary camera. And im use this mob since 1month. Secondary cam quality very poor compare to primary.oppo f1s have good range of features and im like this.Style and design this phone not enough because there is much bigger 5.5inch display. Which is not grip to hold that phone and work proper in one handed. And big disadvantage in this phone because there is no ois and runs on android 5.1v lollipop. Its look like oppo tried to make a cheaper version of f1s. And most big disadvantage in this phone very poor chipset provided by oppo mediatek mt6750 chipset. This is good chipset but not enough to heavy phone in this range. And most important thing in this phone there is no fast charging like vooc fast charging.f1s selfie expert which is far from ideal, when you are expanding close to 18000