3G - technical definition
(3rd Generation) Typically refers to the current generation of data transmission capabilities over a cellular network for Internet access and real-time video. The major 3G technologies are EV-DO for CDMA networks, such as used by Verizon and Sprint, and HSDPA for GSM networks for carriers such as AT&T and T-Mobile. For example, the iPhone 3G, Apple's second generation iPhone, uses HSDPA. For more details, see cellular generations and iPhone.
It Makes a Difference
These two speed tests on the iPhone were taken by switching from AT&T's faster 3G network to its slower, earlier-generation EDGE network in the exact same location. Although speed varies based on how many users are online, this 3G example was nearly 11 times faster than EDGE that day on the beach in Fort Lauderdale, Florida.
Learn more about 3G
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