When this issue happens, pressing the microphone/camera button doesn't seem to do anything. The red slash disappears, so you should be unmuted/camera on, but you still can’t be heard or seen.
- Go to the home screen: swipe upwards from the bottom of the screen to get to your App Dashboard.
- On your home screen, hold one finger anywhere on the screen and slide downwards. This will bring up the Search Pane. Type in 'Settings' and open the Setting app.
- In the Settings app, select the Search button on the top. Type in the app name (Zoom) and the app will come up. Tap the Zoom app.
- Make sure the Camera and Microphone permissions are toggled on toward the green slider. Once those permissions are on, go back into Zoom and see if the issue has been corrected.