AT&T Samsung Galaxy S6/S6 Edge can be upgraded to Android Lollipop 5.1.1. No doubt, AT&T took time for the release of 5.1.1 version, but now users can upgrade their for Samsung Galaxy S6/S6 Edge smartphones across the USA.
If you are going to upgrade your Samsung Galaxy S6/S6 Edge smartphones, please make sure you are connected with a high speed internet connection, preferably over a WiFi connection. Reason for high speed connection is that the update file is around 670 MB, which is a pretty hefty size and it needs time to download.
According to the information, Verizon has pushed updates for the S6, S6 Edge, S6 Edge plus and Samsung Note 5 on September 25th. Also, those uses who are not getting the notification on their Samsung Galaxy S6/S6 Edge smartphones, they can use the following path in their phones: Settings > About Phone > Software Update and check to see if they have any upgrades available now.
If you have received the update, let us know via comments.