Wireless technology and radio frequencies have evolved since they were initially made mainstream in the late 1980’s. The latest incarnation of wireless systems — as of publication in September 2011 — is 4G, which uses different modulation frequencies to manage the transmission data between wireless devices and the networks on which they operate. One of the key benefits of 4G wireless systems is its ability to transmit data at broadband speeds over-the-air, enabling devices on 4G networks to support features such as video calling, internet browsing, streaming radio, and other broadband services.
The 4G modulation frequencies are a range of wireless frequencies used in parallel to transfer data and facilitate voice calls. 4G’s modulation frequency band ranges from 2 to 8 GHz and is capable of transferring data at a maximum rate of 20Mbps. It uses information packets to manage calls and data transfer requests, unlike 3G which uses a combination of packets and circuit-based switches.