The most widely deployed 5G NR band worldwide is n78 (3.3–3.8 GHz), used across Europe, Asia, and parts of the Americas. The US primarily uses n77 (3.3–4.2 GHz, including C-band), n71 (600 MHz for coverage), and n260/n261 (39/28 GHz mmWave). China uses n78 and n79 (4.4–5.0 GHz). Japan uniquely deploys n79 alongside n77 and n257 (28 GHz).