Introduction

When mobile phones were first introduced in the early 1970s, they were capable of doing nothing more than placing telephone calls. When the first 1G cellular network was introduced in 1979, mobile phones hadn’t changed much in features but were beginning to decrease in size. In 1991, the first 2G network was introduced and began the transition from simple mobile phones to “smart” phones that could send and receive email, browse the web, and take pictures, in addition to being able to place phone calls. Nearly 30 years after their introduction, in 2001, the cellular networks began providing the necessary infrastructure to support more modern mobile phones with faster data connections and even greater capabilities.

Since then, mobile ...

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