3G is short for Third Generation Wireless Service. It is an upgrade from 2G and 2.5G wireless devices that allows for even greater voice capacity, along with data transmission speeds of 128 - 384 Kbps for moving devices, and a theoretical top speed of 2 Mbps for stationary devices. 3G is expensive to implement as it does require a different spectrum than 2G and 2.5G and entirely new equipment.
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