Originally Posted by ChuckG

I can't speak to if there is a built in GPS... seems fishy to me considering the kaiser/tilt has a GPS bump on the back to indicate it's satellite antenna.

But at any rate. I am using the same Holux GPSlim 240 bluetooth GPS that I was using on my 6700 and it works great. It's small, gets a signal even when obstructed and never loses it's link with the phone... only downside is the battery life... gotta remember to flip the switch on it when you're not using it, and charge it after about 8-9 hours of use.