When the key lock automatically comes on (which needs to be deactivted during use of Maps) the GPS signal is lost. While the key lock doesn't always come on during drive, it does sometimes randomly.

But this problem can be seen best by going in to 'My Position' letting the device get the GPS signal, move about, and then let the keys lock. When you unlock the keys with the slide switch on the left of the phone, you will see GPS is lost.

Once THIS problem happens during drive it causes a HUGE lag of location from location to actual location.

Maybe fixing this problem, would fix the lag problems caused sometimes.

Nokia N97:
Software Version 11.0.021.262.04
More Details about me in my Profile Page.