The first generation of mobile phones was not as mobile as the phones of today. Known as "car phones," many early models of the mobile phone during the 1980s could only be installed inside your car. Other versions were located inside briefcases and contained large batteries used to charge the phone. During the early 1990s, the second generation of mobile phones were released, also known as the 2G phone. These phones could be carried around and operated on a digital circuit switched transmission, as compared to an analog network frequency. This increased the clarity of the phone calls being placed, and reduced the amount of calls that were dropped, when compared to first-generation mobile phones.
