The basic concept of cellular phones began in 1947 when researchers looked at crude mobile (car) phones and realized that by using small cells (range of service area) with frequency reuse could increase the traffic capacity of mobile phones substantially, however, the technology to do it was nonexistent.
Anything to do with broadcasting and sending a [...]
A cell phone is nothing but a radio, but very high-tech. It is basically like a CB radio or walkie-talkie. But CB radio or walkie-talkie is a simplex system, where at a time a person can talk or listen. But a cell phone is a duplex device, where a person can listen and talk at [...]
Within seconds, one can pass on vital information, send invitation, conduct business and make an appointment miles and miles away either by speech or text message. This is made possible by what an industry expert describes as a technological marvel-the mobile phone.
It is estimated that about 30 billion messages are exchanged worldwide each year, and [...]