Oppo keeps on pumping out those smart phones, concentrating mostly in two segments. One is the higher end, but lowish cost area. The other is far closer to entry level, with models that really look much more expensive than they actually are. See, for example, the $328 Oppo A57 .
Very nice build, Gorilla Glass 5, Dual SIM plus microSD capacity, bright and clear high resolution screen
CPU and gaming performance fairly modest for price point, unfortunate user interface design choices