Originally Posted by plchan
it means it comes out the box and fully functional without doing any OS upgrade and etc. Correct?
Yes. However, there is no software on the 8820 to take advantage of the GPS as it comes out of the box UNLESS you purchase the TeleNav option from AT&T. Not, that doesn't mean you HAVE to pay for TeleNav to use the GPS. There are lots of programs available that will use the internal GPS of the 8820. On mine, I have Google Maps, Nav4all, Windows Live Search, InfoSearch FindIt and an older version of MapQuest Navigator. The only one of those that has a monthly charge is the Mapquest.
Take a look in the GPS forum here for more info.