Have you ever wondered about the frequency band of your cell phone? You might be a businessman who wants to be connected with your customers all the time no matter where you are present at the moment in the whole world. There are various frequency b
ands used by the cell phones that differ from each other. For example, in the United States of America, GSM services employ two frequency bands though there are other two different frequency bands that are used by them somewhere else in the world. Taking this particular problem into account, mobile phone manufacturers such as Nokia, Motorola, Siemens, and Sony Ericsson created a mobile phone that tends to work on all 4 frequency bands known as quad-band phones.
Cell phones make use of radio waves to transmit the talks exchanged. Such radio waves can be having various frequencies. GSM cell phones make use of frequencies within 4 diverse frequency bands.
- 850 MHz [824.2 – 848.8 MHz Tx; 869.2 – 893.8 MHz Rx]
- 900 MHz [880-2 – 914.8 MHz Tx; 925.2 – 959.8 MHz Rx]
- 1800 MHz [1710.2 – 1784.8 MHz Tx; 1805.2 – 1879.8 MHz Rx]
- 1900 MHz [1850.2 – 1909.8 MHz Tx; 1930.2 – 1989.8 MHz Rx]
Even though all these above frequencies are apparently close to each other, a cell phone that tends to work in a particular frequency will not work in the next available frequency except if it is added as a particular extra frequency band. In simple words, when you turn your FM radio to a radio station on 98.1 MHz you cannot hear the radio station on 98.3 MHz except if you tune your radio to it. This is the same procedure that the cell phone frequency band works.
Frequencies used in the U.S and other countries
In the initial stages, the United States used only 1900 MHz for all its GSM cell phone service. However, in the recent times, GSM service on 850 MHz band is widely used since this particular service type is mainly used in rural areas and also because it consists of better range when compared to the 1900 MHz band. Conversely, when the United States began to employ GSM, other countries that had pretty close associations with the U.S also began to use the similar frequencies that were used by U.S. All the international countries that make use of the non-US international frequency bands possess 900 MHz service.
Frequencies required when you travel worldwide
- If you aim to make use of your cell phone only for international purpose, you must decide whether you will be using the cell phone in countries that employ the international frequencies or in other countries that employ the U.S frequencies, or in both types of countries. However, in all the common bands, 900 MHz is the one that is used worldwide and the 1800 MHz will only offer extended coverage in some countries that also possess 900 MHz.
- If you aim to use your cell phone only in the United States, you need to own a dual band phone that employs 850 MHz and 1900 MHz frequencies. Besides, a cell phone that consists of a single band with only 1900 MHz might also offer you a good coverage.
Altogether, if you aim to use your cell phone in both the United States and also in other international countries, you need to own a quad-band cell phone that tends to work on 4 bands such as 850/900/1800/1900 bands.
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