Developers keep discovering more and more new features in the iOS 7 beta everyday. Here are few new discoveries since Apple released the third beta on July 8th.
Previously iOS users could only make video calls while using FaceTime, but Apple has added the ability to have audio-only voice chats when using the video conferencing feature. To make an audio call using FaceTime, just locate and tap the person's name you want to contact, then tap the new telephone icon to place the call. You will be able to perform other tasks like muting the microphone or switching to a video chat once the call is connected.