Cellular Phone

1973-cellular-phone.jpgMartin Cooper develops the first practical cellular phone for Motorola. It was the size of a brick and weighed 2.5 pounds. By 2014, there were nearly 7 billion mobile phone subscriptions, most in developing countries.

World Population : 170,060,000

Key:   1,000,000 People    1,000,000 People (Annotated)    Milestone

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