ISSUE
When attempting to join a meeting using the Webex iOS app, you receive a prompt stating "Permission Required".

RESOLUTION

1. On your device, go to Settings > Privacy & Security > Microphone.
2. Toggle on Webex and Webex Meet.

CAUSE
When attempting to connect through data (not dialing a call-in or receiving a call-back), Webex will use the device microphone and speaker for the audio. This requires enabled permissions in Privacy & Security.