Cellular technology?

Mobile rigs were the beginning of mobile phones, along with taxicab radios, two way radios in police cruisers, and the like.A large community of mobile radio users, known as the mobileers, popularized the technology that would eventually give way to the mobile phone. Originally, mobile phones were permanently installed in vehicles, but later versions such as the so-called "bag phones" were equipped with a cigarette lighter plug so that they could also be carried, and thus could be used as either mobile or as portable phones.