OPPO smartphones have a striking and colorful design both on the exterior and in the operating system. OPPO is a Chinese brand with a large assortment, from more affordable mobile phones to exclusive high-end devices. OPPO smartphones from the A series are starter models and mid-range smartphones. Looking for a high-end device? Choose 1 of the OPPO Find X series smartphones. At Coolblue, you can buy your OPPO as a separate device. So you don't need a phone plan. In addition, these OPPO smartphones are SIM free.