কোন দেশে প্রথম ৫ম প্রজন্মের ওয়্যারলেস সিস্টেম ব্যবহার শুরু হয় ?
Worldwide commercial launch is expected in 2020. Numerous operators have demonstrated 5G as well, including Korea Telecom for the 2018 Winter Olympics and Telstra at the 2018 Commonwealth Games. In the United States, the four major carriers have all announced deployments: AT&T's millimeter wave commercial deployments in 2018, Verizon's 5G fixed wireless launches in four U.S. cities and millimeter-wave deployments, Sprint's launch in the 2.5 GHz band, and T-Mobile's 600 MHz 5G launch in 30 cities. Vodafone performed the first UK trials in April 2018 using mid-band spectrum, and China Telecom's initial 5G buildout in 2018 will use mid-band spectrum as well. The world first service of 5G was in South Korea, as the South Korean telecoms deployed it all at once on 1 December 2018.
South Korea