The cell phone (mobile) invent by Martin Cooper. Martin Cooper is an American engineer. Martin Cooper is considered the "father of the mobile". While at Motorola in the 1970s, Cooper invented the first handheld cellular mobile phone in 1973. 1G First Generation of mobile phone The first handheld mobile phone device was demonstrated by MOTOROLA in 1973. The first commercial automated cellular network was launched in Japan by NTT in 1979. First Generation (1G) system could support far more call but still used analog technology. Basic Mobility Basic Services Incompatibility Analog System 2G Second Generation of mobile phone 2G technology refers to based on GSM. 2G technology was launched in Finland in the year 1991. 2G technology network used a digital signal. It is data speed 64kbps. GPRS-General Packet Radio Service Features of 2.5G:- Enhance 2G signal Higher data speed EDGE-Enhanced Data rates for GSM Evolution, EDGE is also known as Enhanced GPRS (EGPRS...
Current Affairs, Accounts Solution, Computerized Accounting,Hardware & Software information of Computer