First mobile telephone service
Cellular telephone concept proposed
1972: Joel patents cellular call handoff
1973: Cooper makes the first handheld cell phone call
1978: Advanced Mobile Phone Service (AMPS), Cell Phones (AT&T)
1978: First cellular test network
1981: NMT: World's first automatic cellular network launches
1983: Frenkiel helps launch commercial cellular service
Siemens launches first mobile phone
1989: GSM specification completed