The rollout of 5G technology is a phased process that began around 2019 in select cities worldwide. Major U.S. cities saw initial deployments then, with broader coverage expanding gradually. By 2020, significant portions of the U.S., Europe, and Asia had access to 5G services. It's anticipated that by 2025, 5G will achieve widespread global coverage, reaching even rural and underserved areas. This timeline reflects the substantial infrastructure investment and regulatory hurdles involved in a deployment of this scale.