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