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History of Mobile
  a wireless phone to communicate with.  
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Mobile rigs were the beginning of mobile phones for use in vehicles such as 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 transportables or "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.
First generation

The first handheld mobile phone to become commercially available was the Motorola DynaTAC 8000X, which received approval in 1983. Mobile phones began to proliferate through the 1980s with the introduction of "cellular" phones based on cellular networks with multiple base stations located relatively close to each other, and protocols for the automated "handover" between two cells when a phone moved from one cell to the other. At this time analog transmission was in use in all systems. Mobile phones were somewhat larger than current ones, and at first, all were designed for permanent installation in cars (hence the term car phone). Soon, some of these bulky units were converted for use as "transportable" phones the size of a briefcase. Motorola introduced the first truly portable, handheld phone.
These systems (NMT, AMPS, TACS, RTMI, C-Netz, and Radiocom 2000) later became known as first generation
(1G) mobile phones.

In September 1981 the first cellular phone network with automatic roaming was started in Saudi Arabia; it was an NMT system
manufactured by Svenska Radio Aktiebolaget (SRA). One month later the Nordic countries started an NMT network with automatic roaming between countries.

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