If you own a Moto X4 Android One you should have received the over-the-air update notification for November 1 Android security update. New software update for the Moto X4 brings along Camera and Stability improvements.
Motorola’s instructions explain that for a successful installation, the battery in your phone should be at least 50% charged and your device should be connected to a Wi-Fi network or LTE.
If you haven't got the notification of this new software update yet, Just go to Settings - About Phone - Software updates, and It will automatically start downloading the latest update. The update will take around 10-15 minutes to get Installed on your device.
About Android One Moto X4:
The Moto X4 has a 5.2-inch full HD display, powered by the Qualcomm Snapdragon 630 processor, with 4GB of RAM, 32/64GB of storage and a 3000mAh battery inside powering the device. It does also have dual 12+8 megapixel cameras on the back of the device, and it is made of glass with Corning Gorilla Glass 3 protection.
Android One Moto X4 is a little different than the Standard Moto X4 available in the Europe. It has Pure Stock Android, which means that it lacks Moto Apps including Moto Voice, Moto Access, Attentive display, or one-button navigation options. However, you'll still get Motorola Actions (Chop for Flashlight, Twist for Camera, etc.).
Google states this phone will receive an update to Android 8.0 Oreo before year’s end and it will be among the first to receive Android P.