In 1973 Martin Cooper placed a phone call on the first mobile device in the world. Since that first phone call, the number of cell phone subscribers and mobile devices has grown tremendously.
![](/sites/default/files/styles/square_thumbnail_180x180_/public/itjournal/fulltext/2010/09/itj1009d/itj1009dfig01.gif?itok=vNpZAofX)
Don’t have a login?
Make one! It’s free and gives you access to all Cutter research.