Poor performance of dell Wireless 5530 in GPS reception

HI
yesterday I install a Dell Wireless 5530 in my latitude e4200. The WWAN work's perfectly but the GPS experience are too poor. The GPS only give the position when I stay outside, quiet, with clear sky and no larger buildings, When I stay into a car or when I'm on narrow streets with large buildings the GPS doesn't report the position.

Is this a "normal" behavior of this GPS receiver or a malfunction? What are your experiences with it?

 

yeah, its GPS is pretty old-school. I can't get it to use A-GPS mode which should speed it up a lot using data from the celular network. A-GPS is what the iPhone uses to get super-fast lock on your position.