In this course, we will go through the architecture, operation, and optimization of 4G LTE networks, outlining the technical foundation you need to work effectively in mobile telecommunications. Get started with the evolution of mobile standards and the role of 3GPP, then explore end-to-end LTE network architecture. Next, examine the air interface and physical layer, covering spectrum, frame structure, modulation, and OFDMA, then move into the LTE protocol stack including Layer 1 channels, Layer 2 data handling, and Layer 3 RRC signaling. Along the way, learn how radio procedures connect to core network nodes like the MME, SGW, and PGW. The course concludes with practical optimization techniques, including drive test analysis, KPI frameworks for accessibility, retainability, and mobility, and hands-on methods for improving coverage, throughput, and capacity.