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Detroit Police Department was the first to use them, they didn't work very well
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By the 1940's most government agencies, as well as the rich people, had mobile radios. They used them while they were on the go to talk to others.
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The first service created just for mobile phones opened up in St. Louis, MO, but the service didn't work well and it didn't last.
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A car phone service was opened between Boston and New York, but this service was a failure, too.
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First cellphone commercial Dr. Martin Cooper invented a portable hand-held phone that didn't need to be powered through a car. He was the first person to make a mobile phone call.
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Developers in Europe came up with a way to send written messages over the phone. It was called texting.
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The smart phone could send and receive emails and messages, but it didn't have a speaker or microphone. This meant it needed a headset to work.
First Smart Phone -
Apple released its first iphone and it changed the cellular industry. It featured a touch screen and allowed users to do almost anything they could do from a home computer, which basically changed the way people lived.
http://www.youtube.com/watch?v=Lyx_va6f10s