use of TomTom app on iPhone 4s without cellular network
I want to use the TomTom App when the iPhone is in airplane mode (or is there any other way to interfere with the network - without removing the sim).
This because I have a special carphone with dualsim and for correct use the iPhone must be switched off from the network. Then TomTom app states: "bad GPS connection". Is there a way to avoid that? Bluetooth can be switched on in airplane mode, so a mobile GPS receiver could be connected. But will the iPhone put the signal through is the question?
Thx!
iPhone 4S, iOS 5.1.1, with original TomTom App