I don't understand WHY????

i am able to locate the current location via google map, but when turning on sygic or tomtom , these apps just cant get any gps signal. Another thing which is bothering me is that although i use google maps to navigate, the current location is always offset a couple of miles, WHY?

Anyone mind to answer? (GPS Signal or GPS chip failure)

This post has been edited by swee5420: Nov 15 2009, 05:42 PM