T-Mobile is now pushing the Android 10 update to its OnePlus 6T as version A6013_34_191228. As you might expect with an Android 10 update, this one's a biggie, coming in at 1652.9MB.
The update is now rolling out over the air, and both TmoNews and folks on Reddit report that it's hitting devices in the wild. So if you've got a T-Mobile OnePlus 6T you should see it on your phone soon. You can also check for it manually by going into Settings > System > System update > Check for update.
Included in this update are the December 2019 Android security patches, stability improvements, bug fixes, and a "UE-B AGNSS only" mode for UMTS and LTE.
OnePlus has added its own improvements with OxygenOS and Android 10, like lock screen customizations that include the ability to choose your favorite clock style and fingerprint animation. Smart Display in Ambient Mode can also show info like Music, Weather, and Calendar based on what makes the most sense at a particular time.
If you're rocking a T-Mobile OnePlus 6T, let us know when you get your Android 10 update installed!