Apps using CallKit subvert user sound settings

Number:rdar://50499796 Date Originated:May 6 2019
Status: Resolved:
Product:iOS + SDK Product Version:12.2
Classification: Reproducible:


Apps using CallKit can cause audible ringing, even when the user disallows that app having notification sounds.

Steps to Reproduce:

1. Install WhatsApp and set it up.
2. In Settings > Notifications > WhatsApp set Sounds to off.
3. Call that WhatsApp account from another device.

Expected Results:

No ringing. Only a notification about the call should be shown with no sound. Or have a separate setting for calls.

Actual Results:

The device produces an audible ringtone (in the middle of a meeting you’re chairing).


iOS 12.2


iPhone SE


I also have Settings > Sounds > Ringtone set to a silent audio file. It’s not okay for people to be able to make my devices make a sound. I don’t want to turn on silent mode permanently because I like UI sounds if they’re in response my my input (such as keyboard clicks).


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