What are the different types of three-band phones?

There are two basic types of three -band phones. Although both types work on three of the four main frequency belts for mobile phones, one type of three -band phone is used primarily in America, while the other work primarily on frequency bands in Europe. North American three -band phones usually use two primary US frequencies plus one European frequency. On the other hand, European three -band phones usually use two primary European frequencies plus one American frequency. Countries in most Europe, Africa and Asia use mobile phones on a global network for mobile communication (GSM) either 900 MHz or 1800 MHz. With this in mind, American tri-pond phones can use 800/850 MHz, 1900 MHz and either 900 or 1800 MHz frequencies. Similarly, European three -band phones can use 900 MHz, 1800 MHz and either 800/850 or 1900 MHz frequency.

have access and use all four frequencies only four -band mobile phones. Customers in AMErice or in Europe using TRI-BAND phones have access to only two major home frequencies with one additional frequency. Regardless of which GSM network frequency is able to use, it can only approach one frequency at a time. Like radio or television, three -band phones can only be tuned to one frequency at a time.

For American phones, the first frequency of 1900 MHz was used, with a frequency of 800/850 used for newer phones or wandering between towers owned by different service providers. The European Frequency of 900 MHz was the most common used during international travel with the first generation of American three-band phones. Compared to the fact that European three -band phones originally accessible 900 MHz, with 1800 MHz used for newer phones or roaming & mdash; A single American frequency was used during travel to North America. TeHowever, second generation Lefonies used any three of the four main frequencies, with a small preference for one over the other.

6 In this respect, types of phones with three bands are virtually countless, although all phones are suitable for one of the two primary types of phones with three. Alternatively, four -band phones work on all four main frequencies of mobile phones that offer more options and flexibility when traveling abroad.