I am not at all happy with the performance of the Oppo A77S smartphone. I feel like the price of this smartphone is unnecessarily high, when you look at the infirior quality of features and specs that come with this smartphone. Firstly, the display quality is very dull, and the brightness levels are so low that I cannot use the Oppo A77S outdoors. Then comes the performance. The Snapdragon processor inside is pretty slow, and it cannot perform simple tasks like light gaming without lagging or overheating. Even the battery is very inefficient. You can find way better smartphones in this price range, therefore I would not recommend the Oppo A77S.