Mobile Phone Origin
The mobile phone can be used to communicate over long distances without wires. It works by communicating with a nearby base station (also called a “cell site”) which connects it to the main phone network. When moving, if the mobile phone gets too far away from the cell it is connected to, that cell sends a message to another cell to tell the new cell to take over the call. This is called a “hand off,” and the call continues with the new cell the phone is connected to. The hand-off is done so well and carefully that the user will usually never even know that the call was transferred to another cell.
As mobile phones became more popular, they began to cost less money, and more people could afford them. Monthly plans became available for rates as low as US$30 or US$40 a month The modern form of mobile phone is called “Smart Phone”. It has become very popular.
Mobile Phone Origin started in the 1950’s through 1970’s were large and heavy, and most were built into cars. In the late 20th century technology improved so people could carry their phones easily.
Although Dr. Martin Cooper from Motorola made the first call using a mobile phone in 1973, it did not use the type of cellular mobile phone network that we use today.
The first mobile phone networks were created in the late 1970s in Japan.
A cell phone combines technologies, mainly telephone . Most also have a digital camera inside. They send electromagnetic microwaves from base station to base station. The waves are sent through antanenus. This is called wireless communication.
Early cell telephones used analog networks. They became rare late in the 20th century. Modern phones use digital networks.
The radio waves that the mobile phone networks use are split into different frequencies. The frequency is measured in Hz. Low frequencies can send the signal farther. Higher frequencies provide better connections and the voice communications are generally clearer. Four main frequencies are used around the world: 850, 900, 1800 and 1900 Mhz.
Europe uses 900 and 1800 MHz and North America uses 850 and 1900 MHz.
Today there are mobile phones that work on two, three or four frequencies. The most advanced phones work on all frequencies. They are called ‘world’ phones and can be used everywhere.
There are different kinds of phones. A flip phone flips open, and is best for calling. A bar phone is shaped like a candy bar, and the keys and screen are on one face. A slate phone is a phone that has almost no buttons, and uses touch screens . Most smart phones are slates. A slider phone slides on rails. It can slide out number keys or a mini keyboard, but some do both. A swivel spins on an axle.
Networks and payment:
The network is the company that provides the phone service. In most areas there will be more than one mobile network. Customers choose networks based on how well the different networks work in their area, or by price.