3G is the fastest way for cellphones to transmit to
cellphone towers. It is 14.4 Mbit/s on the downlink and 5.8 Mbit/s on the uplink.
This is not as fast as WiFi (Wireless Fidelity), but WiFi
works only within a building. To put his in perspective, 3G is faster than the
orginial 10Mbit Ethernet. It is used in R.I.M. Blackberries and Apple iPhones and
other advanced cellphones. It allows fast digital data exchange, web surfing, audio
and video. It is not needed for pure voice.