Oppo A57 - Black is a Dual SIM smartphone with 5.2" screen IPS LCD, 16 MP front facing camera and 13 MP main camera. Under the hood, it holds Qualcomm MSM8940 Snapdragon 435 Octa-core 1.4 GHz processor runs with Android Marshmallow based ColorOS 3.0 operating system with 3Gb of RAM and 32 Gb of internal memory. This smartphone sports 2900 mAh that can be last a full day. The connectivity features includes Wi-Fi and Bluetooth. It has an SD card slot which can be expanded up to 256GB. Oppo A57 16MP Selfie CameraFlagship-Level PerformanceThe A57sports a 16MP flagship-level front camera. The all new Beautify 4.0 will help capture your best look in breathtakingly detailed photos, giving you bright, head-turning shots even in low light. New Hand Gesture + Bokeh EffectFor Brilliant, Convenient SelfiesThe A57 upgrades OPPO's signature palm shutter function for taking selfies. All you have to do snap a selfie is open your hand in front of the screen, leaving you free to get a stable, well-composed shot. Meanwhile, the new bokeh effect will give your selfies an effortless distinction, offsetting the subject of the photo with a blurry background. 13MP Rear CameraBeautiful Photography Made EasyThe A57 uses Sony's extremely light-sensitive Stacked CMOS sensor, as well as PDAF (phase detection autofocus) techology, so that as soon as you pull your phone out, you'll be ready to get a great shot in an instant. Lightning-fast Fingerprint unlockAccuracy and Speedwith the A57's flagship-level soid-state fingerprint reader, the slightest touch of your finger can unlock the device. With a hydrophobic zirconium surface, the fingerprint reader has a boosted success rate even when your fingers are moist. Long-lasting 2900mAh BatteryMore Power, Better Hand FeelEven in its attractively slight 5.2-inch unibody, the A57 manages to pack a powerful 2900mAh battery, giving the device just the right weight in the hand and offering excellent video playback time. The A57 clocks in at 11 hours of continuous video watching, 23 hours on the phone, or about 13.5 hours in a scenario of varied continued use. 3 GB RAM + 32GB ROMBigger and FasterThe A57's 3GB RAm and Octa-core 64-bit processor make for powerful performance and seamless multitasking. What's more, wuth 32GB of onboard storage, expandable by a further 256GB,, you'll have plenty of room to stock up on your phone with your favourite TV shows and take them out the door. All New ColorOS 3.0 Based on Android 6.0Faster, Steadier, BetterBased on Android 6.0, ColorOS 3.0 is seamlessly responsive, providing a smooth, steady and lightweight experience that optimizes power use and keeps users cruising through the day.