What is TRI-BAND technology?

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Tri-Band Technology concerns portable communication devices (generally mobile phones), which operates over three broadband frequencies instead. Three -band phones, sometimes referred to as "world phones", offer the ability to send and receive calls through a larger geographical range. The three most common frequencies are GSM900 and GSM1800, which are used in most parts of the world, and the GSM1900, which is mostly used in the western hemisphere. When the call is included, the mobile phone searches for a signal from the nearest tower that may or may not belong to a specific provider. All service -based service providers allow you to call others to browse through all towers regardless of ownership, allowing them to provide services in any area where towers exist. This is what allows the user a larger range of roaming, even an international coupling than other network technologies.

whenIt has the ability not only to work on the GSM system, but also to operate three different frequencies, its roaming skills are dramatically increasing. There are two general types of three -band phones; The American, which covers bands 850, 1800 and 1900 and European, covers bands 900, 1800 and 1900. Frequent international travelers tend to rely more on a European model that covers more areas outside the United States and Canada, but if coverage is still not sufficient, there are phones with four bands that allow to add 850 bands.

Tri-band phones still work under the GSM standard, which is second generation technology (2G). 2G phones were the first main upgrade from the original mobile phones from the 80s and at the beginning of the 90s switched the standard from analog to digital. In early 2001, Thbyla introduced the IRD (3G) generation technology, which allowed each phone to stream voice and data simultaneously with faster transfer speeds. 3G became standard, with 4G being zAvenena in 2010, so 2G ​​TRI-BAND technology basically obsolete.

Although the mobile phone is three-way, all frequencies may not be activated by default and the service provider should be notified if the phone is to be used overseas. Phones purchased with service contracts may be locked because although this technology is a triple-band, the service carrier does not have international agreements on roaming, so the phone will not work at international level. If the phone is not locked, you can buy a SIM card from a target country that would reduce fees per minute (because it would not count as roaming), but the phone number can change throughout the stay.