Samsung Galaxy S5 Active is updated to Android 4.4.4
On Monday, AT&T started rolling out Android 4.4.4 for the Samsung Galaxy S5 Active. Version G870AUCU1AOA1 will bring "Miscellaneous improvements, bug fixes, and security updates" to the phone. Samsung suggests that the battery be fully charged before the update process is begun. The manufacturer also says that the update can be postponed three times, but will automatically be downloaded and installed on the fourth try. In other words, there is no escaping Android 4.4.4 for owners of the Galaxy S5 Active.
Since the update is being sent out on a staggered basis, not everyone will receive it immediately. You can try to manually get the update process started by going to Menu > Settings > More Settings > About device > Software update > Check for updates. Touch OK. Eventually, the Samsung Galaxy S5 Active should receive the Android 5.0 update.
source: Samsung via AndroidCentral