Samsung's popular Galaxy S8 and Galaxy S8 Plus flagships had some units ship out with screens tinted a bit redder than they should have been, and Samsung's fix for that is now rolling out to AT&T customers. Just like the update that other U.S. carriers have seen, it weighs in at around 480MB and will bring your device's build number up to G950USQU1AQDE on the Galaxy S8, while Galaxy S8 Plus owners should receive the build number Q955USQU1AQDE. Just like the updates that have hit other devices, this one simply fixes the red tint on the device in much the same way that a user could do manually through the Display Settings menu, i.e. by tweaking the color calibration.
The new software package should be applied in the same way and with the same caution as any other software update. Make sure that your battery is sufficiently charged or plug your device to charge, and be sure not to shut off the phone during the update. Once you're on a reliable power source, head into your handset's Settings menu, tap the "About Device" option, and scan for the update manually on the following screen. If you're not seeing the update, try rebooting the device or scan for the software package later.
It should be noted that the red tint issue in question is reportedly merely a calibration error originating from the factory, and if you can't get your hands on the update to fix it for any reason, you can actually fix it yourself pretty easily through the device's display settings. In the name of top-shelf customer service, however, Samsung's update does that for you and recalibrates the screen to allow you to play with the full spectrum of color and saturation settings from a neutral starting point. The update is still making its way out worldwide, with places like the US, Canada, and Samsung's homeland of South Korea having already received the fix. More details on the availability of the latest software package for the Galaxy S8 and the Galaxy S8 Plus are expected to follow soon, along with information on the commercial performance of both devices.