NTT DOCOMO announced the commercial deployment of New Radio-Dual Connectivity (NR-DC) technology, utilizing three frequency bands—Sub-6 (3.7GHz and 4.5GHz bands) and millimeter-wave (28GHz band)—for high-speed transmissions. This advancement allows the simultaneous transmission and reception across multiple frequencies supported by two 5G base stations. Starting August 1, 2024, this technology will offer Japan’s fastest download speeds of up to 6.6Gbps using 5G Standalone (SA) architecture, initially available in select zones within the 5G SA coverage areas in Tokyo and Kanagawa Prefecture, with plans for gradual expansion.
Standalone (SA) mode is an optional 5G service available for certain smartphones and mobile devices under a 5G service contract. The utilization of this service requires a 5G SA subscription, a compatible device, and a SIM card. DOCOMO first launched 5G SA services in December 2021, and since August 2022, has combined Sub-6 frequencies with the millimeter-wave band to achieve download speeds of 4.9Gbps and upload speeds of 1.1Gbps. This new deployment aims to combine both Sub-6 frequencies with the millimeter-wave band for even higher transmission speeds.
Supported Devices and Download Speeds:
- Xperia 1 VI SO-51E: Max. Download Speed - 6.6Gbps, Available from August 1, 2024
- Galaxy S24 Ultra SC-52E: Max. Download Speed - 6.6Gbps, Available from November 2024
- Galaxy Z Fold6 SC-55E: Max. Download Speed - 6.6Gbps, Available from November 2024
Going forward, DOCOMO plans to expand its range of millimeter-wave band-compatible devices and extend service coverage to enhance customer convenience and quality of life.
