The OPPO A31 is a budget-friendly smartphone with a focus on long battery life and a decent camera setup. It features a 6.5-inch display, a MediaTek Helio P35 processor, and a 4230mAh battery. The triple rear camera system includes a 12MP main sensor, a 2MP depth sensor, and a 2MP macro lens. The front-facing camera has an 8MP sensor for selfies and video calls.