Works for me, but you need GPS lock; I use the international firmware cause im in Australia
I have got one time, a GPS lock without a "net" connection.
usually however i get a GPS lock with a net connection via wifi, and then I can travel and the device has quite a good lock, the red dot follows me when I travel but if the car stops it has trouble locating the position; however when the car starts to move again it follows with the red dot.