Mobile phones have only been around in the last 25 years but a lot has changed.
Who discovered the cell phone? - Quora
The History of Mobile Phones Throughout The Years - Cashfloat
The Evolution of Mobile Phones: A Look Back in Time, Froth Apps - Adelaide's Leader in Mobile & Web Based Apps, App Development Company
Mobile Phones History. When was the first mobile phone invented?
History of Mobile Phones (1973 To 2008): The Cellphone Game-Changers!
The History of Mobile Phones - Gadget Lab - Cell Phone Repair
History of mobile phones - Wikipedia
Smartphone history: a complete timeline
From Brick to Slick: A History of Mobile Phones