Mobile phone..

First there were two-way radios used in vehicles such as police cruisers, ambulances, etc. but were not mobile phones because they were not normally connected to the telephone network. Users could not dial phone numbers from their mobile radios in their vehicles. A large community of mobile radio users 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 that 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 two-way radios. During the early 1940s, Motorola developed a backpacked two-way radio, the walkie-talkie and later developed a large hand-held two-way radio for the US military.
In my opinion mobile phones are a practical invention because if you have a problem or something you can phone somebody.
There is something negative too, if you have all time the phone in your trousers or in your clothes in the future you can have problems in your body, for example if you are pregnant your baby can have problems. this is because of the electromagnetic waves.

ok this is my opinion on mobile phones..

bye bye
bren