Oppo sells over 70 basic and smart mobile phones. Oppo F7 is one of their most popular smartphones priced between Rs 19000 - Rs 24000. Oppo A57 is another popular phone priced below Rs 15000. It is best known for its 13MP primary camera with LED flash and 16MP front facing camera. It is powered by 3 GB RAM. The 32 GB internal memory is expandable up to 256 GB. In terms of design, the Oppo A57 is sleek and stylish. CashKaro offers up to 3.2% cashback at websites such as Amazon and Tata Cliq.