AWS (Advanced Wireless Services) refers to a set of licensed frequency bands in the 1.7 GHz to 2.1 GHz range used for cellular networks, including 4G LTE and 5G services. These frequencies are commonly used by mobile carriers like AT&T, Verizon, and T-Mobile to provide high-capacity, mid-band spectrum for faster data speeds and improved coverage. AWS spectrum is essential for balancing coverage and capacity, making it a key component of modern wireless networks, especially in urban areas where demand for mobile data is high.