Hi

My N9 also randomly loses gps fix whilst navigating.
I have tried a factory reset but the problem persists.
I have the phone set up in portrait position in a windscreen holder with clear view of the sky. I have also noticed that the phone instantly loses gps fix when in landscape position. Not sure if anyone else has noticed this querk.

By comparison, I also have a nokia lumia 800, and have used them side by side for navigation. The lumia has never lost gps fix to date.

Others have posted that the issue shows up when bluetooth is on, so I will try disabling and see how the phone performs then.

Anyone found a solution yet or got a formal response from Nokia?

thanks in advance.