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Cell-phone GPS services can provide an alternate route to getting navigational help. They have most of the same core features and functions as dedicated GPS devices. But overall, cell-phone GPS services aren't quite as convenient.
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We tested six cell phones with GPS capability: the Apple iPhone 3G, LG Scoop, LG Voyager, Samsung BlackJack II, Samsung Instinct, and T-Mobile G1 Google phone. The Apple and the Samsung Blackjack II used AT&T service; the LG Scoop, Alltel; the LG Voyager, Verizon; the Instinct, Sprint.
To activate the service, you generally download the software from the provider to the phone. Verizon uses VZ Navigator software; AT&T, Alltel, and Sprint use TeleNav. The price for using the service is usually about $10 per month or $3 for a single 24-hour period.
Exceptions are the Apple iPhone 3G and T-Mobile G1, which use ...