Selfi oriented smartphone good design. And less money and not a good screen quality. Its have non removable battery and not fast charging Android Marshmallow is another reason to consider the Oppo A57 over the Oppo F1s, as from what Oppo has stated, the Oppo F1s will most likely be stuck on Lollipop. The same could also be true when it comes to the potential future lack of a Nougat update for the Oppo A57, but at least for now its OS is newer. This neglect has long been our pet peeve with budget phones from most brands.