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The first handheld mobile phone was demonstrated by Martin Cooper of Motorola in New York City on 3 April 1973, using a handset weighing c. 2 kilograms (4.4 lbs). [2] In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan. [3] In 1983, the DynaTAC 8000x was the first commercially available handheld ...
After graduating, Rocky taught in the department as a non-permanent lecturer until the beginning of 2015. He stopped teaching due to the issuance of Law No. 14 of 2005 which requires a lecturer to have a minimum of a master's degree; whereas Rocky only holds a bachelor's degree.