Oppo A57 smartphone was launched in November 2016. Never buy this phone it has problem such as hearting issue, battery draining etc. Even the cost is also high I think this mobile want deserve this much. And It is having worst service. Screen Size 5.20-inch
Resolution 720x1280 pixels
Storage 32GB
Processor 1.4GHz octa-core
RAM 3GB
Rear Camera 13-megapixel
Front Camera 16-megapixel
OS Android 6.0
Battery Capacity 2900mAh