How To Check The Build Version Of ATV?

Step 1: Dashboard

Go to the home screen.

Step 2: Settings

Select the "Settings" icon on the top right corner of your ATV screen as highlighted below.

Step 3: Device Preferences

From General Settings select Devices Preferences.

Step 4: Select "About"

From Device Preferences, select the option "About".

Step 5: Android TV OS Build

Scroll down and you can check the ATV build details under the Android TV OS build.