Three of the four companies — NTT DOCOMO, KDDI au, and Softbank — are established carriers, while the fourth, Rakuten Mobile, is relatively new. All four were assigned 5G spectrum by the Japanese government on April 10, 2019.
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On November 6, 2020, China successfully launched an experimental test satellite with candidates for 6G technology into orbit, along with 12 other satellites, using a Long March 6 launch vehicle rocket.
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