So far, the LG V10 has received its update to Android 6.0 Marshmallow internationally, but also for units sold by both Verizon and T-Mobile. And now it's finally time for those V10 handsets sold by AT&T to taste the latest version of Android too. According to a report, the rollout of the Android 6.0 Marshmallow update for AT&T's V10 has already commenced. As this is a staged over-the-air outing, it may be a few days before every AT&T V10 out there receives that coveted update notification. If you're impatient, you can of course manually check for the update by going to the About phone area...
Source: http://www.gsmarena.com/at_ts_lg_v10_is_now_being_updated_to_android_60_marshmallow-news-17889.php