Cheap Wholesale DVB-T DIGITAL TV Mobile Phone With Dual Band And Acceleration Sensor Direct From China Electronics Wholesale Online Shopping. It supports Dual sim cards dual standby + TV + FM + Dual Bluetooth + High-resolution dual camera + 2.8"touch screen + Multiple languages + Dual band.
Knowledge of Dual Band Mobile Phone
In the development of GSM in a few short years, GSM900MHz become the world's leading digital network standards, the vast majority of the world's GSM operators have opted for the 900MHz band. GSM900 frequency is currently increasing scarcity of resources, the development of cell phone network has become a bottleneck. 1992, ESTIMOV recommended personal communications network (PCN) program. This system was initially known as the DCS1800 and GSM900 their technology is very similar, later renamed GSM1800. GSM dual-band GSM network is in fact the two-band digital mobile communication system network stack. The biggest advantage of dual-band cellphone is not in the user aware of the state, two in the 900MHz and 1800MHz networks automatically choose the best services to the most open and automatically switch channels to avoid the phenomenon of the dropped calls. Even in a weak signal, dual band cell phone also has good call quality. China Wholesale DVB-T DIGITAL TV Mobile Phone Specification
