When it comes to cellular phones one must note that cell phones operate on different network bands.
These network bands are in terms of MHz which stands for mega hertz.
The units of MHz are used when describing frequencies that cell phones operate on.
There 4 different types of network bands.
The first is called single band which means wireless devices operate only on one single frequency such as 900 MHz.
The second is known as dual band where wireless devices on two frequencies such as 1800 MHz and 900 Mhz.
The third is recognized as tri band where three bands are functional.
In this case three frequencies are used such as 850 MHz, 900 MHz, and 1800 MHz.
Finally, as you can see the pattern, quad band utilizes 4 network bands 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz.
It is important to note that each country has their own network bands that they utilize.
Therefore when purchasing a wireless device it is mandatory to first check to see if the device is compatible with your country's network standards.
A quad band GSM phone is generally considered a world phone as it covers almost all of the major network bands.
Most phones in the market are usually tri band however there are more and more quad band phones being released into the market.
Quad band GSM phones are of higher value and tend to cost a little bit more than tri band phones.
The benefits of having a quad band phone is that, as stated before, you may use it as a word phone.
This way you can bring your mobile phone around the globe with you and you may use it with ease.