The OPPO A3s mobile features a 6.2" (15.75 cm) display with a screen resolution of 720 x 1520 pixels and runs on Android v8.1 (Oreo) operating system. The device is powered by Octa core, 1.8 GHz, Cortex A53 processor paired with 2 GB of RAM. As far as the battery is concerned it has 4230 mAh. Over that, as far as the rear camera is concerned this mobile has a 13 MP + 2 MP camera CMOS image sensor supporting a resolution of 4128 x 3096 Pixels and the front snapper is powered by a CMOS image sensor. Other sensors include Light sensor, Proximity sensor, Accelerometer, Gyroscope. So, does it have a fingerprint sensor? No, it doesn't. For graphical performance that can make games run smoothly, this phone has got a Adreno 506 GPU. On board storage is at 16 GB with the option to expand the memory by Yes Up to 256 GB. Design is one of the most important factors when it comes to mobiles. This phone is 8.2 mm slim and weighs 168 grams.