Galaxy employs 802.11ac, the specification approved in January that will accommodate Wi-Fi speeds approaching 1 Gbps once it proliferates throughout the infrastructure. In the meantime, Samsung engineers have developed a way to bond Wi-Fi communications with signals on its 4G radio, which is now a Cat 4 device with an available bandwidth of 150 Mbps. When bonded with Galaxy's dual-band Wi-Fi radios, bursty apps have access to Samsung's "Download Booster" with a theoretical pipe of 450 Mbps. Both devices include Wi-Fi a/b/g/n and LTE on AT&T and Sprint. Apple adds T-Mobile and Verizon.