Why do I need to give Firewall microphone permissions?
Firewall forwards all of your inbound calls to a Firewall number, and it also lets you make outbound calls from a Temporary Number. The app needs access to your microphone so that calling will work on the app.
If you don’t let Firewall access microphone permissions, then you won’t be able to access the app. You can give microphone access in the app or through your device’s Settings.