The mysteries of mobile telephony, which is dual band, Tri band and Quad Band Cell Phones and where you work?

Author: Rosa Li

The world of mobile telephony is a confusion One of these days, especially for those who wonder how to start a cell phone. Little is perhaps misleading in that the GSM frequencies and GSM phones seem to work in parts of the world, but not in others.

Several mobile phones and the band can be particularly confusing for those who wonder how to start a cell phone.

So what is the background behind the GSM network?

The GSM network was suggested by a group of European technical and policy makers in 1982 and did not take long for consumers and phone manufacturers to adopt the new network after their first appearance in 1991. It was not long before it is increasingly the mobile phone coverage in a growing number of countries.

GSM world has experienced rapid growth. It there was more than a million subscribers to more than 70 operators in over 30 countries by the end of 1993.

Not only that the new network GSM mobile to send and receive digital information, making it the first mobile phone to 2G developed also gave users considerable freedom in what they did with it. For the first time were able to send short messages written to another by a fraction of the price of a phone call could change your operator and / or go to another country without obtaining a new phone.

All I had to do was take a GSM SIM card and replace the card with another mobile phone and have been in business.

But as the powers of the unknown world, things that should not be easy, and most of the GSM frequencies of GSM networks have already been allocated to other purposes by the establishment.

Thus, in a situation very similar to the TV monitors and people monitoring, a phone that works in Sussex in England not to receive any in San Antonio in the United States. Basically, it was not one GSM frequency.

As a result, many cell phone manufacturers to create mobile phones that can work with more than one group with some work with the largest number of 4 bands.

Even this does not mean that there are no questions and are often people left to ask:
* What is GSM?
* What are the GSM frequencies?
* Why are GSM phones on a band?
* Different frequencies are used in different areas?
* How do I find out if a phone in a particular field?
* How phones are defined van Banda and work?

We will try to see the questions in this article.

What is GSM?
GSM, Global System for Mobile communications (or the symbol formerly known as Group Special Mobile) is a transmission standard used for wireless phones mobile and, more recently, wireless modems. GSM and CDMA are different because they use a GSM SIM card to store all the information needed to send and receive calls from phones with CDMA keep everything on the phone.

If you want to start a business cell phone and has no working capital to thousands of people in GSM mobile phones will probably be a better option CDMA because they are not attached to a carrier and do not require a license to a seller to sell the phone unlocked.

Another reason to select GSM CDMA is more than the opening of the base of potential customers for each phone. Unlocked GSM can be used with any GSM network. To date, there is no such thing as an unlocked CDMA phone. In the case of most cell phone plans (especially those of States) of the love of CDMA phones, like freezes for consumers to them.

Why mobile phones on a band?
The GSM phones are more for a band that they will work on more than one country has more than one GSM frequency and are not universally provided.

As a result, manufacturers are more mobile GSM and GPRS mobile phones with multiple groups so they can work in several countries. The Most work on cell phones, two, three or even four bands. Quad Band phones are the most flexible because they can be used throughout the world and are often of international telephone calls in the future.

How do I set up multiple phones banda and where they work?
Multi-band phones are usually defined by the number of GSM frequencies and can generally operate in four different categories, dual band, tri-band and quad band. While the debate on the establishment of a cell phone business is important to remember the different types of groups, because it could mean the difference between its customers to obtain a high performance phone and you are happy with them and can get a shiny, expensive papers.

Dual band GSM operates at two frequencies and, depending on your phone probably do for frequencies of 900MHz and 1800MHz. These phones are generally less expensive than other types of mobile phone and can be a good way to get a good mobile phone to send SMS and MMS as that mobile phone WAP.

The tri-band phone operates at three frequencies and can be used in most countries. This unlocked GSM cell phone is a cheaper option than the quad-band phone, but safer than a dual-band phone.

Quad band phones, phones or international as they are sometimes called, uses the four bands and can be used anywhere in the world. If you're looking for to launch a mobile phone company and ask yourself what an unlocked phone guaranteed to sell good and give you fewer problems with customers is likely to be what type of mobile.

What are the GSM frequencies?
Almost all world works in the frequencies of 850MHz, 900MHz, 1800MHz, 1900MHz and 400MHz few circumstances, but there are other frequencies in other places.

Fortunately very areas in which each of the working frequencies is easy enough defined in very general sense (although still advantageous to check). So when you're looking for a cell phone which areas should be able to work to follow a guide.

Thus, they use the GSM 900 and 1800 MHz and the signals that use the GSM 850MHz and 1900MHz frequencies can be classified into two groups.

If you Traveling with your cell phone in Oceania, Africa, Europe, Asia (except Japan and Korea), the Middle East, Brazil and the Baltic region and research network, after the coverage of mobile network roaming will be 900MHz, 900MHz or 1800MHz and 1800MHz.

If you are looking for a GSM phone work in the United States or South America, then you better adhesion to a cordless phone operating at 850MHz and 1900MHz bands.

Different frequencies in different areas?
With most of the GSM world is divided into two main groups (those most GSM World is more or less and four frequencies 850MHz or 900MHz and 1800MHz and 1900MHz or unlocked GSM phones will work in one, two or three frequencies GSM in the world you have a certain level of international roaming on a phone unlocked.

However, you do not get in May joy, for example, if you have a phone designed for dual-band in Europe and Asia, and then try to use the bluetooth phone United States.

How do I know if a working phone in a particular field?
There are two mechanism to verify the phone operates in a particular area, the first is to get the phone from the banda, which can usually be found in the product description.

If you work by href = "<a 20target% =" _blank> http://www.chinavasion.com/index.php/cName/mobile-phones/" target = " blank "title =" how to start a phone business Cellular "> how to start a business cell phone and consider actions, regardless of whether you think of the multimedia mobile telephone WAP mobile phone or watch, the process must be the same. If cell phones that offer a major supplier or wholesaler Dropship put the ball in his court. They should have this information on your website or material Promotional Product for unlocked cell phones.

Once you have a GSM GSM frequency can ensure that work in your area.

If you are looking for a mobile phone for you this could be as simple as calling your local service provider or GSMworld research on sites such as dot-com and dot-com worldtimezones.

If you're wondering how to launch a cell phone company, your best course of action is a list of frequencies in the description of the GSM mobile phone with other phone functions (such as a phone or if the music is a good camera phone) and tell the person who wants to buy unlocked cell phone that parts of the world you are likely to work in

It seems that cell phones and GSM frequency bands are not afraid then. It's just a matter of knowing where to look and make sure you have the right phone to the correct location.

Learn more about cell phones and large groups Tips _blank> http://www.chinavasion.com/index.php/cName/mobile-phones/ "target =" blank "title =" How to start a business mobile phone "> how to start a cell phone in http://www.chinavasion.com. The best source of unlocked cell phones and cell phones online now.

About the author:

Li is the PR Manager for Chinavasion, China dropshipper of the first large consumer electronics Consumables

Article Source: ArticlesBase.com – Mysteries of mobile phones What is Dual Band, Tri Band and Quad Band Cell Phones and where you work? "> The Cell Phone Mysteries, What is Dual Band, Tri Band and four mobile phones and banda Where will I work?

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