Turns out to be an internet hoax where they claimes it changes the way the phone would "tower jump" or something like that. All it does is give you a readout of what tower your using or some weirdness.
However, it did get me to a screen with some GPS stuff that was neat like giving you GPS direction and speed (though I haven't tested it). Maybe it was in the normal menu too, but i never look at that stuff I just make phone calls
Anyway to get there is [#][*] [menu] [right arrow]......do it fairly quick and you're there, then choose GPS then navigation.