Default Calling App on vehicle (Bluetooth)

I have a question about the default calling function that is supported by third-party apps on iOS from 18.2.

In most cases, it works normally with the default calling app setting, but the problem occurs when connected to the vehicle via Bluetooth.

  1. Install the app that sets the default calling app on the device.
  2. Keep the phone locked.
  3. Connect the Bluetooth to the vehicle.
  4. Try to make a call using the phone button on the vehicle's steering wheel.
  5. When trying to make a call from the vehicle, the call fails (It seems that the app cannot be opened when the phone is locked even if the default calling app setting is on.)
  6. When you unlock the phone and turn on the app, the call is made.

As far as I understand, if the app scheme is called with tel:// when set as the default calling app, it only proceeds with the intent connection to the app set as the default calling app, and the permissions that Apple's default call app has cannot be used.

Accordingly, my questions are as follows:

  1. Is there a way to make a call with an external phone call input when locked on device?
  2. If 1 is not possible, can you provide a branch to Apple's default call app (telephony://) in the above situation?
Default Calling App on vehicle (Bluetooth)
 
 
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