* Kanto area: Tokyo, Kanagawa, Saitama, Chiba, Ibaraki, Tochigi, and Gunma prefectures
*As of the end of May 2024 (compared to the end of January of the same year) according to KDDI research. Sub6 is the nickname for the 3.7GHz, 4.0GHz, and 4.5GHz frequency bands that contribute to high-quality 5G communications (high speed, large capacity, low latency).
*Rakuten Mobile roaming service only provides partial 4G LTE (800MHz).