Apple iPhone 3G: The Ultimate Travel Device?

Photo: Associated Press
by Tom Loftus
Chances are not single a travel reporter was among the thousands attending yesterday's keynote address at the Apple's Worldwide Developer Conference in San Francisco. But the newly-announced Apple iPhone 3G is sure to appear in the pages of various travel web magazines in the months to come. The "iPhone 3G is real! GPS looks like a killer app" reads the lead from yesterday's post on the tech blog CrunchGear.
For the first time, the iPhone will combine Assisted GPS (A-GPS), a faster version of traditional satellite-derived data combined with Wi-Fi hot spots, and cellular towers. The three technologies can work in tandem or separately, as the Apple web site explains.
If GPS is available, iPhone displays a blue GPS indicator. But if you're inside--without a clear line of sight to a GPS satellite--iPhone finds you via Wi-Fi. If you're not in range of a Wi-Fi hot spot, iPhone finds you using cellular towers.
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