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800MHz frequency is known as the “golden band” in the communication industry. It has long transmission distance and strong penetration ability, which is very important for the construction of 4G network in remote areas. All industrial 4G routers support telecommunications 800 band LTE.

Different mobile card operators have different network bands. The 7 modes of 4G router refers to seven different communication network modes supporting GSM, CDMA200 1xRTT, CDMA2000 1xEV-DO, WCDMA, TD-SCDMA, TDD-LTE, and FDD-LTE (2G/3G/4G network of China Mobile, Unicom, Telecommunications). It fits all kinds of networks, which means the cards of the three major operators in China can be used in any network environment. The 5 modes supports TDD-LTE, FDD-LTE, TD-SCDMA, WCDMA, and GSM (China Mobile&Unicom's 4G, 3G and 2G networks, Telecommunication's 4G network). All Seriallink routers are 7 modes products, except customization.