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and Mobile Networks. Springer Science & Business Media. p. 1. ISBN 9781447149057. "VoIP: Who Invented this Revolutionary Technology?". voip.review. 2017-11-27...5 KB (540 words) - 22:11, 12 August 2024
Mobile Networks. Springer Science+Business Media. pp. 202–204. ISBN 9781447149057. Ryo Yoshida; Michiaki Yasumura (July 9–11, 2008). "A New Cell Phone...8 KB (784 words) - 00:53, 19 August 2024
