Garmin does have an app for the iPhone, it says you can plan routes but does not say how. You can check the features by going to apples App Store or just google it. You do not need a cell signal for it to work because the iPhone has a GPS enabled chip.
No way to Bluetooth the phone to both your Bluetooth headset and the HD radio aux port that I know of. The phone will not pair to 2 differing devices.
If you go wired headsets you can get all the features of the radio and use the phone for navigation, phone calls, text, search all with voice control with the HD Bomm iPhone interface.
Www.hdbomm.com/phone.html
Jim@hdbomm.com
Jim,
I don't mind switching the Bluetooth to either the Cardo or the radio, I don't need to have them paired at the same time, as we use the Cardos primarily for trips and just want to have the i5 bluetoothed to the aux input to use as a music source while riding local.
The Cardo has plug in capability also, and I have the switched headphone jack from Iron Cross Audio, haven't even tried it yet as the Bluetooth sound to the Cardo headsets sounds great to us.
Thanks for the info on the Garmin app, researching now.
Does anybody that has used the Garmin app have any feed back??