when i first tried the GPS yesterday i was indoors and it was unable locate me. however the building is metal and does not receive TV or Radio signal well at all, it would however lock on to me if i stepped out side. after reading that the proper way to test the GPS is with the use wireless off i gave it a try on Campus at UTA. i was walking out of class and it instantly locked on (5 to 10 seconds), no blue circle of uncertainty just a blue dot . when zoomed all the way in it was VERY accurate, as i walked by the library the blue dot turned into an arrow of the direction i was walking macthed my progress step for step. i was impressed to say the least it was light years ahead of my blackberry