There's a new update available for AT&T LG G2, and it fixes something that went wrong with the last update. If you'll recall, back in February the AT&T LG G2 got its first taste of Android 4.4.2. Unfortunately, it seems that that update to KitKat also introduced a few bugs that made things less convenient for Google+ and Google Wallet users.
Specifically, it made the Tap & Pay option for Google Wallet disappear. Now, with a 5.59MB update (679MB if you somehow haven't updated to Android 4.4.2 yet), that is fixed and all things are right in the world.