In addition, the AT&T's Galaxy S6 edge+ (plus) (SM-G928A) variant hasn't have any movement yet. But it might follow shortly this coming few days.
Here's the details:
What's New:
- Android device security updates
AT&T Galaxy S6 Active SM-G890A Update version G890AUCS6DQF1
- Android version: 7.0
- Android Security patch level : June 1, 2017
- Baseband version: G890AUCU6DQF1
- Kernel version: 3.10.61-10950877
- Build number: NRD90M.G890AUCS6DQF1
- Build fingerprint: 7.0/NRD90M/G890AUCS6DQF1
AT&T Galaxy S6 SM-G920A Update version G920AUCS6DQF1
- Android version: 7.0
- Android Security patch level : June 1, 2017
- Baseband version: G920AUCS6EQF1
- Kernel version: 3.10.61-10950877
- Build number: NRD90M.G920AUCS6EQF1
- Build fingerprint: 7.0/NRD90M/G920AUCS6EQF1
AT&T Galaxy S6 edge SM-G925A Update version G920AUCS6DQF1
- Android version: 7.0
- Android Security patch level : June 1, 2017
- Baseband version: G925AUCS6EQF1
- Kernel version: 3.10.61-10950877
- Build number: NRD90M.G925AUCS6EQF1
- Build fingerprint: 7.0/NRD90M/G925AUCS6EQF1
These were just tiny little thing OTA update as it only weighs at around 16 MB in file size. These updates are seeding via Over-The-Air as we speak, so you can take the update either manually check the update by going in to your device Settings > About phone > Software updates > Check for Updates.
Source: AT&T Galaxy S6 active [1] , Galaxy S6 [2], and S6 edge [3] support pages.
