In Pictures: iOS 7 tips and tricks you need to lea...
FaceTime Audio Calls
If you live in an area with spotty reception and yet happen to have a strong Wi-Fi connection, you might want to consider making calls using FaceTime Audio. To do so, tap on a contact listing and tap the telephone icon to the right of the FaceTime option. Note that this feature will only work with other iOS 7 users.
In Pictures: iOS 7 tips and tricks you need to learn