Posts Tagged ‘Cellular Phones’
Jul 30 2009
Mr. Chemistry asked:
Radio frequencies are extremely low energy, not even enough to get a molecule spinning around as I understand. How is it that they could have any effect on your brain?
Radio frequencies are extremely low energy, not even enough to get a molecule spinning around as I understand. How is it that they could have any effect on your brain?
Note: I’m not interested in whether or not cell phones actually do cause brain damage- I understand its a current topic of debate. My question is: by what mechanism could the low frequencies used for cellular phones possibly cause damage to living tissue?
Melisa
Jul 14 2009
Jim Johnson asked:
With all the various models offered by cell phone service providers, it can be confusing when deciding which cell phone to buy. And of course, cell phone technology continues to improve rapidly, bringing even more features to the newest cell phones on the market. But here are a few guidelines regarding what you can expect to get when you buy a cell phone.
First of all, remember that the cell phone is not the most important part of this communication equation, the network is. So choose your cell phone service provider first, based on the quality of performance and customer service as well as other usability factors.
Once you have your cell phone provider in mind, it’s a good idea to visit their store to physically inspect the phones that they have available. This is important because you can’t tell very much about how usable a cell phone is simply by a picture. Usually, it’s necessary to actually hold them and see how easy they are to use in order to determine how well a particular phone will meet your needs.
Generally speaking, you’ll find that most cell phones are broken down into three categories, basic phones, advanced phones, and smart phones.
The basic phone these days is capable of both making voice calls and text messages. This kind of phone is probably the best choice for most consumers, as they are the most inexpensive phones that you can buy and are relatively easy to use. They may not have some of the fancy capabilities that you’ll find in the more advanced phones, such as photos, video, and Bluetooth capability for wireless headsets, but for basic cell phone usage they are hard to beat.
The more advanced phones these days offer extras like being able to shoot photos and videos and send them to others over the cell phone network, or store them on built-in memory cards. They may also include music players and options for storing music files. And another very popular feature on more advanced cellular phones is Bluetooth capability allowing for use of a wireless headset. Of course all these extra features come at a price, usually up to two to three times the cost of a basic cell phone.
The most advanced cell phones on the market these days are called smart phones and are kind of a combination between an advanced cell phone and a PDA, or personal digital assistant. The main advantage to these kind of cell phones is that they eliminate having to have two pieces of electronic equipment to carry with you at all times by combining them both into one unit. Of course, these models can not only perform all the functions of an advanced phone, but they can also allow you to schedule appointments, keep track of addresses, and even access e-mail. These are by far the most expensive cell phones though, commonly costing several hundred dollars.
As you can see, there is a wide variety of cell phone models to choose from. But before you buy, be sure that you know exactly what features will be most important to you in daily usage, and then buy the cell phone that best meets those needs.
Sheldon
With all the various models offered by cell phone service providers, it can be confusing when deciding which cell phone to buy. And of course, cell phone technology continues to improve rapidly, bringing even more features to the newest cell phones on the market. But here are a few guidelines regarding what you can expect to get when you buy a cell phone.
First of all, remember that the cell phone is not the most important part of this communication equation, the network is. So choose your cell phone service provider first, based on the quality of performance and customer service as well as other usability factors.
Once you have your cell phone provider in mind, it’s a good idea to visit their store to physically inspect the phones that they have available. This is important because you can’t tell very much about how usable a cell phone is simply by a picture. Usually, it’s necessary to actually hold them and see how easy they are to use in order to determine how well a particular phone will meet your needs.
Generally speaking, you’ll find that most cell phones are broken down into three categories, basic phones, advanced phones, and smart phones.
The basic phone these days is capable of both making voice calls and text messages. This kind of phone is probably the best choice for most consumers, as they are the most inexpensive phones that you can buy and are relatively easy to use. They may not have some of the fancy capabilities that you’ll find in the more advanced phones, such as photos, video, and Bluetooth capability for wireless headsets, but for basic cell phone usage they are hard to beat.
The more advanced phones these days offer extras like being able to shoot photos and videos and send them to others over the cell phone network, or store them on built-in memory cards. They may also include music players and options for storing music files. And another very popular feature on more advanced cellular phones is Bluetooth capability allowing for use of a wireless headset. Of course all these extra features come at a price, usually up to two to three times the cost of a basic cell phone.
The most advanced cell phones on the market these days are called smart phones and are kind of a combination between an advanced cell phone and a PDA, or personal digital assistant. The main advantage to these kind of cell phones is that they eliminate having to have two pieces of electronic equipment to carry with you at all times by combining them both into one unit. Of course, these models can not only perform all the functions of an advanced phone, but they can also allow you to schedule appointments, keep track of addresses, and even access e-mail. These are by far the most expensive cell phones though, commonly costing several hundred dollars.
As you can see, there is a wide variety of cell phone models to choose from. But before you buy, be sure that you know exactly what features will be most important to you in daily usage, and then buy the cell phone that best meets those needs.
Sheldon
Jun 25 2009
Wyatt S Doolittle asked:
Mobile Phones, more commonly known as Cellular Phones or Cell Phones are electronic gadgets that are portable and offer convenient means of communication. Cell phones combine technology with mobility in telecommunication. Over the years, cell phones had gained the interest of the public leading to extreme popularity making it the world’s most used means of communication. Nowadays, some people even prefer having cell phones than maintaining regular land lines due to its mobility, cost-efficiency, entertaining features and capacity to maintain a personal directory making it a multi-purpose gadget.
Current advancements in cell phones also allow sending of text messages via Short Message Service or SMS; and depending on the features that support the cell phone unit, pictures, music, videos and animated picture messages can also be forwarded or sent to other cell phone users via Multimedia Messaging Service. These features makes messaging and communication interesting, fun and engaging.
Communicating messages through calls, SMS and MMS via cell phone is possible anytime and anywhere provided that certain considerations are met including the availability of cell site, battery life and the features that support the cell phones. Cell phones are long-range electronic devices that connect to cellular network of base stations which have links to the public switched telephone networks making it a highly useful portable device.
Like in standard telephones, proper phone etiquettes should also be practiced when using a cell phone. Another concept of a cell phone is that it is personal. A cell phone contact number is more often than not, designated to one person. That is why when trying to get hold of a particular person, calling him through his cell phone guarantees higher chances of actually speaking to that person first hand than calling his office phone or residential phone number wherein other people may answer the call. Calling the cell phone number of the person you want to get in touch with saves time because it means calling the person directly.
Cell phones are powerful devices. Breakthrough innovation in communication was made possible using a cell phone device which is supported by the network provider wherein one can actually see the person on the other line. This led to the popularity of video cell phones or video phones. The world of cell phone advancements and technology make the world seem so small, and since e-mails and internet browsing are also made possible using cell phones, it adds convenience and enables one to save the time and energy in getting hold of a computer anytime and anywhere.
Eliseo
Mobile Phones, more commonly known as Cellular Phones or Cell Phones are electronic gadgets that are portable and offer convenient means of communication. Cell phones combine technology with mobility in telecommunication. Over the years, cell phones had gained the interest of the public leading to extreme popularity making it the world’s most used means of communication. Nowadays, some people even prefer having cell phones than maintaining regular land lines due to its mobility, cost-efficiency, entertaining features and capacity to maintain a personal directory making it a multi-purpose gadget.
Current advancements in cell phones also allow sending of text messages via Short Message Service or SMS; and depending on the features that support the cell phone unit, pictures, music, videos and animated picture messages can also be forwarded or sent to other cell phone users via Multimedia Messaging Service. These features makes messaging and communication interesting, fun and engaging.
Communicating messages through calls, SMS and MMS via cell phone is possible anytime and anywhere provided that certain considerations are met including the availability of cell site, battery life and the features that support the cell phones. Cell phones are long-range electronic devices that connect to cellular network of base stations which have links to the public switched telephone networks making it a highly useful portable device.
Like in standard telephones, proper phone etiquettes should also be practiced when using a cell phone. Another concept of a cell phone is that it is personal. A cell phone contact number is more often than not, designated to one person. That is why when trying to get hold of a particular person, calling him through his cell phone guarantees higher chances of actually speaking to that person first hand than calling his office phone or residential phone number wherein other people may answer the call. Calling the cell phone number of the person you want to get in touch with saves time because it means calling the person directly.
Cell phones are powerful devices. Breakthrough innovation in communication was made possible using a cell phone device which is supported by the network provider wherein one can actually see the person on the other line. This led to the popularity of video cell phones or video phones. The world of cell phone advancements and technology make the world seem so small, and since e-mails and internet browsing are also made possible using cell phones, it adds convenience and enables one to save the time and energy in getting hold of a computer anytime and anywhere.
Eliseo
May 16 2009
Roberto Sedycias asked:
Cell phones or cellular phones are so called as they cover compartmentalized, cell like areas. The origin of the Cell phone can be traced back to the year 1973 when Motorola came up with World`s first cellular portable telephone which was commercialised as Motorola DynaTAC 8000X.
These days, new cell phones are being added at a rapid pace. The parts of them typically consist of following: circuit board; antenna; keyboard; LCD – liquid crystal display; battery; microphone; speaker.
In recent times, they are available with a wide range of functions. To list a few functions, depending on the type of cell phone you choose: store contact information; keep track of appointments; set reminders; prepare to-do lists; send/receive e-mail; play games; send text messages (sms); access to internet; watch and enjoy TV; built-in calculator; integration with other devices like GPS receivers, MP3 players, etc.
Cell phones, operating on radio frequency, have come up with an innovative cellular approach to counter limited availability of RF spectrum. Now, several cell phone towers are used to cater to a large geographic area.
Each tower (base station), covers a circular area called a cell. A large region is split into a number of cells allowing different base stations to use the same channels/frequencies for communication. This enables thousands and thousands of mobile telephone users to share far fewer channels.
Another important aspect is that, phones need less power to transmit to reach any base station as each base station covers a smaller area. Reducing the required transmit power reduces the size of the battery and thereby the weight of the phone. This has led to miniaturization of cell phones which would not have been possible without the cellular technology.
When you use your cell phone, following things happen. First the phone locates base station having strongest signal, and requests for a channel assignment. The base station permits channel assignment and the call gets accepted. The call is then forwarded to the local telephone network if it is to a regular phone otherwise it is transmitted through the cellular network. The call is then sent to its destination through the telephone network.
When the cell phone is switched on, SID (System Identification Code) on the control channel compares it to the SID programmed into the phone. If the SIDs match, the phone understands that the cell is communicating with home system. The phone sends a registration request, along with the SID and the MTSO keeps track of the phone`s location in a database. If the SID on the control channel does not match the SID of your phone, then the phone is in roaming.
The three technologies commonly used by 2G cell phone networks for transmitting information: frequency division multiple access (FDMA); time division multiple access (TDMA); code division multiple access (CDMA).
GSM (Global System for Mobile communications) implements TDMA, to connect to the specific service providers in different countries. GSM uses subscriber identification module (SIM). SIM stores all the connection data/identification numbers needed to access a particular wireless service provider.
Standard 2.5G protocols used widely are GPRS, EDGE to name a few. Some latest 3G protocols are: Universal Mobile Telecommunication Service (UMTS); Wideband Code-Division Multiple Access (WCDMA); High-Speed Downlink Packet Access (HSDPA); Evolution Data Maximized (EVDO).
A few popular cell phone models in the market have been offered by Nokia, Ericsson, Motorola, Samsung, LG, etc. with each model with its own range of collections.The year 2008 may be a high watermark in the cell phone history with Nokia N-Gage 2, HTC Dream, Apple iPhone 2, BlackBerry Touchscreen, Sony PlayStation Phone which are expected to be launched.
Willard
Cell phones or cellular phones are so called as they cover compartmentalized, cell like areas. The origin of the Cell phone can be traced back to the year 1973 when Motorola came up with World`s first cellular portable telephone which was commercialised as Motorola DynaTAC 8000X.
These days, new cell phones are being added at a rapid pace. The parts of them typically consist of following: circuit board; antenna; keyboard; LCD – liquid crystal display; battery; microphone; speaker.
In recent times, they are available with a wide range of functions. To list a few functions, depending on the type of cell phone you choose: store contact information; keep track of appointments; set reminders; prepare to-do lists; send/receive e-mail; play games; send text messages (sms); access to internet; watch and enjoy TV; built-in calculator; integration with other devices like GPS receivers, MP3 players, etc.
Cell phones, operating on radio frequency, have come up with an innovative cellular approach to counter limited availability of RF spectrum. Now, several cell phone towers are used to cater to a large geographic area.
Each tower (base station), covers a circular area called a cell. A large region is split into a number of cells allowing different base stations to use the same channels/frequencies for communication. This enables thousands and thousands of mobile telephone users to share far fewer channels.
Another important aspect is that, phones need less power to transmit to reach any base station as each base station covers a smaller area. Reducing the required transmit power reduces the size of the battery and thereby the weight of the phone. This has led to miniaturization of cell phones which would not have been possible without the cellular technology.
When you use your cell phone, following things happen. First the phone locates base station having strongest signal, and requests for a channel assignment. The base station permits channel assignment and the call gets accepted. The call is then forwarded to the local telephone network if it is to a regular phone otherwise it is transmitted through the cellular network. The call is then sent to its destination through the telephone network.
When the cell phone is switched on, SID (System Identification Code) on the control channel compares it to the SID programmed into the phone. If the SIDs match, the phone understands that the cell is communicating with home system. The phone sends a registration request, along with the SID and the MTSO keeps track of the phone`s location in a database. If the SID on the control channel does not match the SID of your phone, then the phone is in roaming.
The three technologies commonly used by 2G cell phone networks for transmitting information: frequency division multiple access (FDMA); time division multiple access (TDMA); code division multiple access (CDMA).
GSM (Global System for Mobile communications) implements TDMA, to connect to the specific service providers in different countries. GSM uses subscriber identification module (SIM). SIM stores all the connection data/identification numbers needed to access a particular wireless service provider.
Standard 2.5G protocols used widely are GPRS, EDGE to name a few. Some latest 3G protocols are: Universal Mobile Telecommunication Service (UMTS); Wideband Code-Division Multiple Access (WCDMA); High-Speed Downlink Packet Access (HSDPA); Evolution Data Maximized (EVDO).
A few popular cell phone models in the market have been offered by Nokia, Ericsson, Motorola, Samsung, LG, etc. with each model with its own range of collections.The year 2008 may be a high watermark in the cell phone history with Nokia N-Gage 2, HTC Dream, Apple iPhone 2, BlackBerry Touchscreen, Sony PlayStation Phone which are expected to be launched.
Willard
May 01 2009
Eugene Eshitemi asked:
Cell phones are electronic components that have significantly transformed several peoples life style. Where would we be if this technology would not have been there? Most of you will agree with me that life wasn’t that friendly without the cell phone technology. We have seen the world transform from one stage to another.
After the launch of the first cell phone technology, we have witnessed numerous transformations in the mobile phone industry. Mobile phones have become more or less computers. They can multitask just like any computer can.
As cell phone technology flourishes, there are some facts that one should know about cellular phones. When you purchase your cell phone, you should check for warranty provided by the cell phone manufacture. We have seen several cases where one purchases a mobile phone and before he or she explores the cell phone, the cell phone fails to function. Another important thing to note is that cell phones get spoilt and at one point you be required to get a spare part for it. You have to be cautious while purchasing spare electronic devices for your cell phone. You have to make sure that the part you are purchasing is genuine and it is compatible with your cell phone structure.
When most people go to purchase a particular cell phone, they are usually exited about the cell phone but they never think in terms of cell loss. They never take a risk of protecting their cellular phones from being theft. It is a fact that cell phones are stolen and they are some of the commodities that go like hot cakes.
Click here for more information.
Ferdinand
Cell phones are electronic components that have significantly transformed several peoples life style. Where would we be if this technology would not have been there? Most of you will agree with me that life wasn’t that friendly without the cell phone technology. We have seen the world transform from one stage to another.
After the launch of the first cell phone technology, we have witnessed numerous transformations in the mobile phone industry. Mobile phones have become more or less computers. They can multitask just like any computer can.
As cell phone technology flourishes, there are some facts that one should know about cellular phones. When you purchase your cell phone, you should check for warranty provided by the cell phone manufacture. We have seen several cases where one purchases a mobile phone and before he or she explores the cell phone, the cell phone fails to function. Another important thing to note is that cell phones get spoilt and at one point you be required to get a spare part for it. You have to be cautious while purchasing spare electronic devices for your cell phone. You have to make sure that the part you are purchasing is genuine and it is compatible with your cell phone structure.
When most people go to purchase a particular cell phone, they are usually exited about the cell phone but they never think in terms of cell loss. They never take a risk of protecting their cellular phones from being theft. It is a fact that cell phones are stolen and they are some of the commodities that go like hot cakes.
Click here for more information.
Ferdinand
Feb 16 2009
alanfromlv asked:
Any kind of browser that could be used for mobile banking. WAP etc. All cellular phones in use today world wide. Any subset of this would be fine (Asia, U.S. Europe, etc)
Fannie
Any kind of browser that could be used for mobile banking. WAP etc. All cellular phones in use today world wide. Any subset of this would be fine (Asia, U.S. Europe, etc)
Fannie