Well, apparently ATT, Sprint and Verizon arent fans of the concept, as theyve decided to omit the feature from the new Galaxy S5. The good news is that Samsung confirmed to us that both T-Mobile and U.S. Cellular will offer the Download Booster function on its S5 devices. Download Booster is designed to let you tap LTE and Wi-Fi simultaneously, which Samsung claims will dramatically speed up downloads.