T-Mobile has finally started to push Android Oreo 8.0 to the LG G6 smartphone. The update brings Android Oreo 8.0 and not Oreo 8.1 and this is the first major update since LG G6 launched. The update carries the build number H87220a and along with Oreo update, it brings Various bug fixes and software improvements. After the Oreo update, it supports all the native Android Oreo features such as picture-in-picture mode, autofill apps, and more.
The Update can be manually checked through Settings-> Software update. It will take another couple of days for the update to hit all the devices as an OTA, as the update will be rolled out in phases.