I can't hang up phone calls using the thumb controller (iOS).
There are limitations in the Bluetooth® connection profiles which currently prevent the COBI.Bike App from being able to hang up. When the person you talked to, hangs up, the app returns to the dashboard.
Can I take or make calls while riding?
Yes, you can take calls directly from your handlebars. You can also connect any Bluetooth® headset/headphones to communicate or get turn-by-turn directions via voice commands. Don't forget that you first have to add your contacts from your smartphone list to the app by tapping the "Edit" button (Note: While riding the touch is disabled on your smartphone). You will be able to call them quickly while riding.