Unlike previous flagships, the Galaxy S5 comes with a rather small collection of big new features, as Samsung works on focusing on a better experience instead of tacking on unnecessary new functions. One of those features is Download Booster, which uses a Wi-Fi and LTE connection simultaneously to download files faster. However, it looks like the feature is missing from the AT&T variant of the Galaxy S5, according to reports from various consumers that have received their pre-orders of the device earlier than expected.
According to Android Police, Download Booster was missing from demo units of the AT&T Galaxy S5 as well, and cannot be found anywhere on the retail units that are now in hands of consumers. It's unclear if the feature was removed on purpose, or if it's an oversight that will be fixed through a software update, so we'll have to wait for an official confirmation from the carrier to see what's going on here.