@dxitt Have yet to get Maemo Mapper to turn on the TM506's GPS. MM will connect to the 506 through BT, but it is unable to start the GPS. I am using a T-Mobile branded firmware though, and that could be preventing my N810 from starting the GPS. However, if you've got a TMO data plan, just use the A-GPS Beta program with MM while you're tethered to the 506, and you "should" be seeing satellites in less than a minute. Also, if your not going to get a data plan, you will probably want to de-brand the phone, since the GPS on the TMO branded version sucks too! @secgeek The 506 has a great battery, but using GPS will drain it faster than any other activity on the phone. If your gonna use it all day, you'll want to buy a car adapter and/or some spare batteries.