Update to AT&T's LG V10 adds Wi-Fi calling
The update features software version H90021v, with build number MRA58K. The size of the file is 368MB. If you haven't received notification that the update has arrived, you can try to manually pull it out by going to Settings > General > About phone> Update Center > Software Update > Update Now.
The LG V10 was released on October 8th of last year with Android 5.1 pre-installed. It has since been updated to Android 6.0. The sequel, the LG V20, is expected to be the first phone to come with Android 7.0 out of the box.