You no longer need dual cameras or a Pixel 2 to take DSLR-like portrait photos with your phone... provided you're using Instagram. The social service has rolled out a Focus camera mode that will soften the background the moment it detects a face in the scene, giving you that portrait mode effect no matter how many cameras your phone has. It's available on the iPhone 6S and newer Apple devices, as well as "select" Android handsets.