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