Understanding Cell Phone Frequency Bands

Perhaps you’re a businessman who needs to remain in bit with you’re purchasers even if you’re traveling from one side of the world to another or even you’re simply someone who wants to be updated of all the news and hips around. Therefore, you’re trying for a perfect phone that suite your desires, are you not? But what type of frequency band can you think about?

In the US, GSM services use 2 frequency bands while there are two completely different frequency bands that were employed by them elsewhere in the planet. Considering this dilemma, a number of the notable mobile makers like Nokia, Siemens, Ericsson and Motorola developed a phone which will work on all four frequency bands commonly known as as quad-band phones.

Thus what regarding this frequency band? Let us attempt to perceive additional regarding it.

Cellular phones use radio waves to transmit conversations. These radio waves can be at different frequencies. Think about this interesting record of various frequencies used by totally different types of radio services.

GSM cell phones use frequencies inside four different 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)

Although 850 and 900, 1800 and 1900 are seemingly shut figures, a phone that works in one frequency band unfortunately will not work in the frequency band next to it unless added as a particular further frequency band. To contrast, when you have your FM radio tuned to a radio station at ninety eight.1 MHz, you'll be able to clearly never hear what is happening on another radio station at ninety 8.3 MHz unless you retune your radio. You got it? This is actually how the phone frequency band works.

Formerly, the US solely used 1900 MHz for its GSM cellular phone service. But within the passing years, there has been a growing quantity of GSM service on the 850 MHz band simply as a result of this sort of service is usually been utilized in rural areas, since it has higher range than the 1900 MHz band. However, it had been also been employed in city areas particularly when the cell phone company has spare frequencies unused within the 850 MHz band and no remaining frequencies to use in the 1900 MHz band.

On the opposite hand, when the US began to use GSM, a few alternative countries with very close links to the US selected to copy the US and use the identical frequencies that US used. In truth, nearly while not exception, all international countries that use the non-US international frequency bands have 900 MHz service.

Thus which frequencies are required when traveling internationally?

If you plan to use your phone only internationally, you wish to make a decision if you'll be using the phone in countries that use the international frequencies or in countries that use the US frequencies, or in each. Nevertheless, in all common bands, 900 MHz was used internationally and therefore the 1800 MHz will solely give expanded coverage in countries that additionally have 900 MHz.

However, if you propose to use your phone solely in the US, you only need to induce a dual band phone that has each 850 MHz and 1900 MHz. A single band phone with solely 1900 MHz can offer almost as smart coverage anyway.

Summing up, if you intend to use your phone in each the US and internationally the simplest resolution is to urge a quad-band phone that can work on four bands that is the 850/900/1800/1900 MHz bands.