Oppo f1 s phone is a very chip.and please dont buy this phone because this display is a very cheap quality, and, your display will get damage very easily. And no warrenty avail for this cheap product.that sound sorrounding is a very law and it design and glass is a very cheap.oppo f1s and samsung j7 is the same specification.and there is too much deferance in its price.its camera is not good working.