Motorola launched the new Moto X4 last year which came with Android 7.1 and was updated to Android 8.1 later. Now Motorola is pushing the recently launched Android 9 Pie update to the Moto X4.
Motorola announced the list of devices eligible to get the Android 9 Pie update earlier and has already started pushing the update to Moto X4. As per the source, the OTA update of Android 9 Pie weighs around 1.1 GB in size which comes with build number PPW29.69-17.
Currently, the new Android 9 Pie update is available for the Indian version of Moto X4 and will be soon made available to other countries in coming weeks. Keep checking the update under settings panel in the About the phone.