MNOalso: エムエヌオーFreq.FrequencyTop 100,000Meanings1nounmobile network operator; MNOtelecommunicationsTechnical term in telecommunications for a company that owns and operates a mobile network infrastructure.日本にほんの主おもなMNOはドコモ、au、ソフトバンクです。The major MNOs in Japan are Docomo, au, and SoftBank.