https://techcrunch.com/2018/08/06/say-hello-to-android-9-pie/

The nickname for Android 9 is “Pie.” It’s not the most inspired of Android names, but it’ll do. What really matters at the end of the day are the new features in Pie — and there are plenty of those.

If you are a Pixel owner, you’ll be happy to hear that Pie will start rolling out as an over-the-air update today. The same goes for every other device that was enrolled in the Android Beta (that includes any Sony Mobile, Xiaomi, HMD Global, Oppo, Vivo, OnePlus and Essential devices that got the betas) and qualifying Android One devices. Everybody else, well, you know the drill. Wait until your manufacturer launches it for you… which should be the end of the year for some — and never for quite a few others.