au

MVNOs sell their own SIMs and plans but run on au's network rather than owning one.

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About au

KDDI Corporation, operating under the "au" brand, is a major mobile network operator in Japan (MCC 440), part of the broader Asia & Middle East region. Identified by the Mobile Network Code (MNC) 70, au competes primarily with NTT Docomo and SoftBank, forming the trio dominating the Japanese mobile telecommunications market. Au boasts widespread 4G LTE coverage and is aggressively rolling out 5G services across Japan, aiming to provide enhanced connectivity and faster speeds to its subscribers. Known for its innovative marketing campaigns and collaborations with various companies, au offers a wide range of mobile plans, devices, and related services. They are significant players in the IoT (Internet of Things) space within Japan, and also have a number of sub brands that are popular within the country. Like other Japanese carriers, au prioritizes technological advancements and invests heavily in research and development to stay ahead in the competitive landscape. The network’s reliability and focus on customer service have contributed to its strong market position and it has made great strides to connect the more rural areas of the mountainous country.

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