You can use ooVoo without a front camera on your mobile device, as long as your device is supported, and you are able to download ooVoo.
From your PC or Mac, you can mute your camera before or during a video call.
Without a camera, you can still participate in video calls, send text messages, and share photos. During video calls, you will still be able to see your friends, but they will not be able to see you. If you have added a profile photo to your account, this photo will display for you friends in place of your video image.