The Motorola Nexus 6 Smartphone on US Cellular and Sprint already got the latest Android 5.1.1 update few weeks earlier and now AT&T has also announced the same update for its Nexus 6 units.
The update is available OTA (Over-the-air) and is around 81MB in size. It brings stability improvements and disable the smart-lock feature when EAS password policy is turned on. It also brings the build number LMY47Z.
The update notification should automatically pop up on your device. If it’s not, don’t forget to check it manually by heading to Settings -> About Device -> Software Update.