A mobile radiotelephone, often in an automobile, that uses a network of short-range transmitters located in overlapping cells throughout a region, with a central station making connections to regular telephone lines. Cell phone is also called as mobile telephone. Professional cell phone greetings are a simple, cost effective way to professionalize your image. First let’s look at what an unlocked cell phone. Some cell phones are designed to use a Subscriber Identification Module card or SIM card for short. A SIM card is a microchip that stores subscriber data. The SIM card is issued by a carrier and provides cell service by activating any phone into which it is inserted. A locked cell phone, however, will only recognize a SIM card from a particular carrier. If the cell phone is unlocked, it will recognize a SIM card from any carrier. The “lock” is software setting that keeps the cell phone “loyal” to one carrier.
The advancement in digital technology and microelectronics has included many applications like alarm clocks, calculators, Internet browsers, and voice memos for recording short verbal reminders, while at the same time making such telephones vulnerable to certain software viruses. Not only this cellular phones ad come up with camera which has the capability to send these photos to another cellular phone or computer. In many countries with inadequate wire-based telephone networks, cellular telephone systems have provided a means of more quickly establishing a national telecommunications network.
Do not allow children to use a cell phone, except for emergencies. The developing organs of a fetus or child are the most likely to be sensitive to any possible effects of exposure to electromagnetic fields.
If cell phones played a limited role in society there would be no debating their safety. Wireless communication is packaged into hip, little slide and flip phones that defy location. Talk when and where you want, take business on the road and enjoy a growing range of extra features that deliver music, video, messaging and Internet capabilities. Extraordinarily intuitive and convenient, though they are, cell phones are powerful telecommunications devices.
Well I’ve reached the point with cell phones where I feel the need to lay down the law. There are some real abuses of wireless technology being perpetrated all around us, and the time has come to create some social order out of the cell phone chaos. This is by no means an exhaustive list simply because as the technology evolves, new annoying traits will surely emerge. But commandments usually come in tens, so think of this as the first Ten Commandments of cell phone etiquette, with amendments to follow.
Telecommunications system in which a portable or mobile radio transmitter and receiver, or “telephone,” is linked via microwave radio frequencies to base transmitter and receiver stations that connect the user to a conventional telephone network. The geographic region served by a cellular system is subdivided into areas called cells. Each cell has a central base station and two sets of assigned transmission frequencies; one set is used by the base station and the other by mobile telephones. To prevent radio interference, each cell uses frequencies different from those used by its surrounding cells, but cells sufficiently distant from each other can use the same frequencies. When a mobile telephone leaves one cell and enters another, the telephone call is transferred from one base station and set of transmission frequencies to the next using a computerized switching system.
Source by: Mike Prull