What is a quad band radio?
Quad-band radios are radios that can operate in four frequency bands. Popular uses of quad-band radios can be found in GSM cellular phones and amateur radio communications equipment.GSMGSM (Global System for Mobile Communications: originally from Groupe Spécial Mobile) is the standard for mobile telephony systems. GSM is the most popular standard for mobile communications in the world with over 80-percent market share, according to GSM Association.GSM Frequency BandsGSM mobile phones operate in the following four frequency bands: 850 megahertz (Mhz), 900 Mhz, 1800 MHz, and 1900 MHz. Due to historical reasons different countries and regions of the world have adopted different frequency bands of operation for mobile devices and infrastructure. In the United States, for example, the GSM technology operates in 850 MHz and 1900 MHz bands.GSM Quad PhonesGSM quad phones are becoming quite prevalent as more people prefer them when they travel to different countries/regions and want to use thei
