Oppo A57 sports a 5.2-inch HD LCD display with 2.5D curved glass design and has a 16MP front camera.
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Oppo A57 Announced With 16MP Selfie Camera: Specification & Features - Smartprix Bytes
Oppo A57 with 16 MP front camera, fingerprint sensor launched in India for Rs. 14990 – AndroidPure
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Oppo A57: Specifications and Price for 2022
Renewed - Oppo A57 Dual SIM Mobile Phone, 32GB Storage, 3GB RAM, 4G LTE Network, 16 MP Camera, Wifi+Cellular Connection Type, Octa Core, Gold
Oppo A57 Original Unlocked Mobile Phone 3gb Ram 32gb Rom 5.2 Inches 13mp+ 16mp 4g Lte Dual Sim Card Cellphone 2900mah~in Stock - Mobile Phones - AliExpress