What Is Quad Band Technology?

Quad-band is the GSM mobile phone network with four frequency bands of 850/900/1800 / 1900MHz. It refers to the number of network bands supported by the mobile phone.

Quad-band

At present, there are four types of GSM mobile phone networks. The 900M and 1800M frequency bands are commonly used in different provinces in China. Some places are only 900M such as Hebei Mobile, some are only 1800M such as Anhui, and some are 900M and 1800M. Like Guangdong, but domestic GSM mobile phones are dual-band automatic switching without worrying.