OPPO A31‘s 4GB RAM provides faster performance to ensure you can play games and multi-task with ease. A super large memory of 128GB ROM lets you download and save more photos, music and videos. Moreover, OPPO A31 supports up to 256GB of additional memory with the three-card slot (Dual Sim + MicroSD). With this much storage, entertainment has no limits.It Comes with With a 4230mAh battery, you can watch videos, play games and listen to music all day long. You can watch HD videos online for up to 14 hours4, or play games for up to 7 hours.OPPO A31 runs smoothly during games and video playback, with reduced power consumption having 2.3GHz Octa-Core Processor.