What is the difference between four-band and tri-band?

Quad-Band and Tri-Band are types of mobile phones technologies. The basic difference between four -band and three -band phones is their likelihood of operation in different countries. In general, three -band phones will work in some countries and telephone phones will work in almost all countries. The terms four-band and tri-bandly refer to frequency bands to which the phones will respond in the mobile phone signal. These phones are used by passengers in areas where a limited, dual -band phone will no longer work. TRI-BAND supports the connection with the three Global System Frequency bands, while the four-band supports four frequencies. Although the manufacturer generally advertises the advantage of four -band and three -band technology technology to attract the buyer, information about the frequency band is also listed on the packaging. Generally, a list of frequency belts will appear as a sheet like "GSM 850, GSM 900, GSM 1900" or as a number of relevant numbers of separate slashs such as 850/1800/1900. This information is usually available on the label inside the battery case on the phone.

The

area where the phone with the threefinals will be best may vary depending on the range of the phone's frequency band. Usually, three-band phones work on the 900/1800/1900 or 850/1800/1900 frequency belts, but some rare phones of this type use the frequency ranges of 850/900/1900. TRI-BAND technology is good for people who perform limited travel because the combined frequency range allows mobile access to most continents. Forty phones connect to 850/900/1800/1900, allowing coverage in any country with a standard mobile signal. A person who makes a large amount of travel to different countries would most benefit from a four -band GSM phone.

Quad-band and Tri-Band phones are more extensive than more limited phones with double beltm. Those designed for use in only one country can work on less frequency belts. In the United States there are many dual -belt phones and will only work in the basic area in which they were purchased. Most GSM phones in North America use a combination of 800, 850 or 1900 frequency belts. Some dual band phones are made for North America, including the United States, while some double band phones will only work in Europe, Asia or Africa. Some dual -zone phones can operate in limited international ranges, such as 850/1800 phones that work in both the United States and India.