about 200 words the mobile phone ,an essential item today
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A mobile phone (also known as awireless phone, cell phone, or cellular telephone) is a small portable radiotelephone.
Siemens AX72.
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. Cell phones have become so cheap to own that they have mostly replaced pay phones and phone booths except for urban areas with many people.
The modern form of mobile phone is called "Smart Phone". It has become very popular. The majority of mobile phones made after 2010 are "smartphones". They can be used ascomputers as well as making voice calls.
History
Mobile phones in the 1950s through 1970s 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 Motorolamade 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. Now almost allurban areas, and many country areas, are covered by mobile phone networks.
Siemens AX72.
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. Cell phones have become so cheap to own that they have mostly replaced pay phones and phone booths except for urban areas with many people.
The modern form of mobile phone is called "Smart Phone". It has become very popular. The majority of mobile phones made after 2010 are "smartphones". They can be used ascomputers as well as making voice calls.
History
Mobile phones in the 1950s through 1970s 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 Motorolamade 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. Now almost allurban areas, and many country areas, are covered by mobile phone networks.
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