Oppo R9s review: An important step forward

Oppo makes some small but important steps forward with its latest handset bound for Asia. Without making much of a splash in the west, Oppo has found itself towards the top of the list of smartphone manufacturers. While the top two, Samsung and Apple, are still a ways out, Oppo is now a constant presence around the number four spot, and that's no small achievement. Like many other phone makers from China, we've seen significant improvements from Oppo in several key areas with recent devices. The...