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VIDEOVIEW: Samsung SGH-i780 - A-GPS functionality
Posted by Arne Hess - on Thursday, 15.11.07 - 12:44:59 CET under 08 - Reviews - Viewed 36743x
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As mentioned, one of the features of the Samsung SGH-i780 is its A-GPS receiver and in today's video view I have a closer look on how well it works. Standard GPS receivers must download data from GPS satellites. This is difficult and can take several minutes. A-GPS dramatically improves the performance of GPS receivers by providing them with data that they would ordinarily have to download from the GPS satellites. With A-GPS data, GPS receivers can operate faster and more reliably.
So the i780's A-GPS combination improves the overall performance for example when surrounded by tall buildings or when the satellite signals are weakened by being indoors or under trees and, this is important to know, it doesn't necessarily used a GPRS or UMTS connection but WiFi works fine as well.

Nevertheless, to use the i780'S A-GPS receiver, the mobile phone radio needs to be turned on. In flight mode, A-GPS cannot be used. The i780 indicates in the phone application if the A-GPS receiver is in use or not. On the left a screenshot with A-GPS off, on the right A-GPS on and in use:

In general, A-GPS doesn't needs to be turned on or off. As soon as an application calls the A-GPS receiver it turns on automatically (as well as it switches off automatically as soon as the application doesn't requires GPS anymore or if closed).

In the video bellow I've used Google Map Mobile to find myself:

As you can see in the video above, first A-GPS was off, after Google Map Mobile was launched and GPS was activated, A-GPS switched on automatically.

Coming next, a closer look at the optical joystick and the 320 x 320 pixel touchscreen.

Cheers ~ Arne


 
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