Yes I really don't get it. Sygic and tomtom both have GPS apps to be installed into the iPhone and claimed to be able to use it offline. So I downloaded a copy of sygic into my iPhone but it went dead as I turned the airplane mode on!? Am I able to use this gps app just like how I am using a garmin montana 650 handheld gps? Someone please make me click. This is driving me nuts as I am planning to travel from Singapore to Thailand soon.