In the dark ages before cell phones, people who really needed mobile-communications ability installed radio telephones in their cars. In the radio-telephone system, there was one central antenna tower per city, and perhaps 25 channels available on that tower. This central antenna meant that the phone in your car needed a powerful transmitter -- big enough to transmit 40 or 50 miles (about 70 km). It also meant that not many people could use radio telephones -- there just were not enough channels.



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Traveling abroad and you want to be able to make cell phone calls from overseas? You may be surprised to learn that the vast majority of cell phones in use in the United States do not work outside of North America. Not only that, but those U.S. based cell phone services that do allow you to make calls from overseas charge outrageous "international roaming" fees. Most international cell phone rentals also have extremely high per minute rates.
Cell phone international rates are typically astronomical. Due to the vast range of tariffs and different savings options associated with mobile phone plans, most people are unaware of their own pricing plans and thus wind up paying much higher rates than necessary for their overseas calls. Using portable dial-around service (from the U.S.) or international callback (from outside of the U.S.) allows cell phone users to make cheap international calls at traditionally lower fixed voice plan rates or even better. The savings can often be as high as 90%!
There is no difference. They are just different ways of referring to the same thing. The term 'cellular' comes from the way cell phones operate, by communicating with radio antennas that cover areas known as 'cells'. Because cellular communications are evolving to include things other than voice calls, the terms 'wireless' and 'mobile' are being used more often.
A carrier's reception varies depending on the terrain, physical obstructions, and the number of cellular towers in your area. recommends asking friends and family who have wireless service for their opinion of a carrier's coverage and call quality.

Like televisions, alarm systems, computers, and all other electrical devices, Cell phones (also called mobile phones) are radio devices that use Radiofrequency (Rf) energy emit electromagnetic radiation. They operate at low power (less than 1 watt) by transmitting and receiving electromagnetic radiation in the radiofrequency (RF) end of the spectrum. Radiation which is called "ionizing" can be absorbed by tissue and break molecules apart, such as gamma rays and x-rays, are known to cause cancer.  The damage to the dna molecules is thought to be the cause. The radiation that a cell phone uses is also part of the same electromagnetic spectrum, but is not ionizing. For this reason, the US FDA can regulate these devices to ensure that the radiation doesn't pose a health hazard to users, but only once the existence of a public health hazard has been established.

EHSO has seen no credible evidence to date that cell phones cause cancer or brain tumors.  It is illogical to believe that evidence of unusual brain tumors is covered up when there are hundred's of millions of people using cell phones worldwide. There is a TREMENDOUS amount of junk science and thoroughly ignorant (as in untrained, uneducated) people running around naming themselves as experts and publishing their opinions on the internet. This hype and fear-mongering has only one goal: to puff up the egos and wallets of those propagating nonsense.
However, cell phones are still relatively new, and while the radiation may not be likely to cause cancer, it may cause some other type of damage (certainly accidents in cars from being distracted while fumbling with the phone