When consumers speak of a triband dual SIM phone, they usually are referring to a phone that is capable of using two SIM cards and operating on three separate frequency bands. Triband phones are meant to work in more than one country, but the countries that the phone can receive service in depend on which three frequency bands are included on the phone. Dual SIM cards can give a cell phone user an additional phone number with which to work.
One of the benefits of owning a cell phone that can use two SIM cards is that the cell phone user can have two simultaneously operational phone numbers. This can be useful for the average cell phone user, and it is particularly advantageous to those who travel internationally and require triband phones. A triband dual SIM phone can provide network coverage in international countries and offer its owner phone numbers in two different countries. This makes reaching the cell phone owner easier for his or her contacts. For instance, contacts in two separate countries can dial local phone numbers and still reach the cell phone user, no matter his or her physical location.
A consumer should choose a triband dual SIM phone carefully. Cell phones around the world operate on the four frequency bands of 850 megahertz (MHz), 900 MHz, 1800 MHz and 1900 MHz, so consumers need to select the appropriate bands to coincide with their needs. The 850 MHz and 1900 MHz frequency bands work in North America, and the 900 MHz and 1900 MHz bands operate in Europe, Asia and Africa. Consumers will have to determine where they intend to use their cell phones the most and select corresponding bands so that service can be provided to their cell phones. For example, if a cell phone user anticipates using his or her cell phone mostly in the United States, he or she would be wise to select a triband dual SIM phone that works on the 850 MHz and 1900 MHz frequency bands; the other band selected would depend on the international country in which he or she would expect to use that cell phone.
A triband dual SIM phone can work with two SIM cards, so it's capable of doing a lot more than the standard dual or single band phone that works with only one SIM card. However, should a consumer need even more functionality, he or she could look into a purchasing a quadband cell phone. Quadband cell phones operate on all four frequency bands and, thus, automatically can work anywhere in the world.