5G, the fifth generation of cellular technology, is ushering in a new era of connectivity in 2025. It goes far beyond faster smartphones, enabling unprecedented speeds, ultra-low latency, and the capacity to connect millions of devices simultaneously.This article traces the evolution from 1G to 5G and breaks down the key innovations: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC).