(Telecompaper) Japanese operator NTT Docomo has announced it will commercially launch its 5G service on 25 March. At the time of launch, the service will achieve a maximum data rate of 3.4 Gbps, and in June the downlink will increase to a maximum 4.1 Gbps, Docomo said. Docomo's 5G coverage will initially encompass around 150 locations nationwide and then expand to all prefectures by June. More than 500 cities are expected to have access to Docomo's 5G service by March 2021.