Yeah, signal for the speed cameras la. wat kind of GPS you
huv?
All GPS in this world need an 'open sky' to have an unobstructed line of sight
to recv signals from at least 4 or more satellites to give you the
location, time, weather, etc.
think he means GPRS.
GPS can see through tunnel, Osama long kena caught liao, no need
to wait so long.