This is a discussion on Droid gps- real or fake? within the Droid General Discussions forums, part of the Droid Discussions category; I"ve been doing research and i can't seem to get a definitive answer.
Does the droid use a real satilite gps or a cell signal ...
Yeah. You get a VERY accurate GPS tracking when you have GPS enabled, but if you're Data Roaming, the phone won't be able to reroute. [This setting CAN be changed, but then you pay data roaming charges. Best advice, check the path before heading out if you're going on a long trip, and then stick to it unless you KNOW you'll have coverage.]
It uses aGPS and "real" GPS. Settings/location: If "Use wireless networks" is checked, it will use aGPS (and other methods); if "Use GPS satellites" is checked, it will use standalone GPS (which provides better accuracy).
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It uses aGPS and "real" GPS. Settings/location: If "Use wireless networks" is checked, it will use aGPS (and other methods); if "Use GPS satellites" is checked, it will use standalone GPS (which provides better accuracy).
Thanks for adding details to my response! I personally don't have "Use GPS satellites" enabled unless I'm using Navigation or one of a very few apps that I have that require it to function best. As I'm pretty sure it states in the settings menu, it conserves battery to turn this off when not using it.
To add to YOUR response, aGPS is what the Alltell/VZW nav phones tend to use, if that helps clarify anything to the OP.
\aGPS is what the Alltell/VZW nav phones tend to use
All US cell phones have been required by the FCC to be location capable since 2005. Sprint and T-Mobile 3G also use aGPS.
I'm pretty sure that, even when standalone GPS is turned on, the Droid makes use of aGPS when it can. By doing so, it can get almanac and ephemeris data from the local cell site, reducing time to first fix to a couple of seconds (vs. a minimum mean of 45 seconds for GPS without aGPS support).
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sGPS is what you're asking about and it's listed under the Connectivity section. Keep in mind that the sGPS receiver and Google Maps are 2 separate things. The sGPS receiver does not need data. Google Maps does need data.
If you want to navigate without data coverage then you need to use a suitable GPS nav app.
BTW, GPS is only actually in use and consuming battery when the GPS icon is visible in the right group of status icons at the top of the screen. There is no real need to shut off and turn on GPS all the time unless you have certain apps that will activate the GPS on their own regardless of whether you're actively using the app, such as Locale. I use WeatherBug, and when I unlock, its widget checks where I am if it's been a few hours since it last checked my location. It doesn't activate the GPS every time I unlock. If I use a GPS-capable app, the icon appears when I start it, then disappears when I switch to another app. For a day or so, there was some buzz about the new Dolphin browser turning on GPS and leaving it on, but that seems to have been pinned down to using Google as the start page. The fact that people reacted strongly to any app that left GPS on says that we've become accustomed to apps making sparing use of the GPS ability.
Certainly, anyone who wants to shut off their GPS for any reason can do so, my comments are only to reassure the OP that this is not a requirement.