Multi-band device

The term triband in mobile phones means that they send to three different frequency bands and can receive. In most cases, these handsets support the bands 900, 1800 and 1900 MHz. The first tri-band mobile phone world was the Motorola Timeport, which came on the market in 1999.

In Europe, the network operators use two frequency bands, the 900 MHz band ( originally called D- Net, T -Mobile and Vodafone) and the 1800 MHz band (originally DCS 1800, also known as E-Net, E -Plus and O ₂ ). Before a mobile phone can be used in both frequency bands, it must therefore have at least dual-band capabilities. Besides Europe, the function Dual band mobile phones 900/1800 MHz in large parts of Africa and the Asia / Pacific region, as there the same frequency spectrum is used.

In the Americas, most network operators use the 1900 MHz band. To make calls here, the phone also needs support for this frequency band. Increasingly, operators there also the so-called 850 MHz band. U.S. mobile phones are therefore now often designed as a dual band phones with 850/1900 MHz.

For global access to the GSM network is a mobile telephone that can use the four frequency bands ( quad-band ), are required.

In Japan, is set with a Personal Digital Cellular digital mobile radio network, which in turn uses different frequency bands.

Mobile phone
Radio frequency

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