This course offers a deep dive into the core principles of modern mobile networks, from 4G LTE to the cutting-edge world of 5G and beyond. Explore the fundamentals of radio access including spectrum properties, duplexing, modulation, and multiple access schemes - before tracing the architectural and technological evolution from the mature 4G LTE standard to the revolutionary design of 5G New Radio (NR). Instructor Rahul Kaundal provides a detailed overview of both 4G and 5G systems, deconstructing the protocol stacks, from the physical layer signals and channels up to the data link and control layers. An ideal fit for engineers, technical managers, and telecom professionals who need to build a rigorous, practical understanding of how modern networks function, this course equips you with the skills to analyze network performance, troubleshoot complex signaling procedures, and navigate the underlying engineering complexities that define current and future mobile communications.