About Oppo A57. . The Oppo A57 features a 5.2-inch LCD HD ( 720×1280) resolution display. The smartphone powered by a Snapdragon 435 octa-core chipset clocked at 1.4GHz coupled with 3GB of RAM, 32GB of internal storage which is expandable up to 256GB via microSD card. Good phoneAbout Oppo A57. . The Oppo A57 features a 5.2-inch LCD HD ( 720×1280) resolution display. The smartphone powered by a Snapdragon 435 octa-core chipset clocked at 1.4GHz coupled with 3GB of RAM, 32GB of internal storage which is expandable up to 256GB via microSD card.