Here is the first Android 4.4.2 KitKat Stock Firmware for AT&T's Samsung Galaxy S5 Active (SM-G870). The stock firmware will be useful just in-case when the time comes that you might want to return back your Samsung Galaxy S5 Active SM-G870 to it's official firmware. The stock firmware can wipe root or any customization that you may wish to be completely remove from your phone. Once your phone has been modified, it also proven essential to use the stock firmware if you cannot receive any OTA update anymore Some advanced user have had used the stock firmware if they have messed-up from customization and resulted into bricks, so the stock firmware is also best for fixing unwanted soft-bricks, bootloops or just stuck on a welcome screen logo. So like I said, use of the stock firmware is for AT&T's Galaxy S5 Active G870A advanced users only. This cannot be used and is not recommended by any of those who did not know how...
