1. With FaceTime, you can participate in video calls with other FaceTime users over a Wi-Fi or cellular data connection.
   Note: FaceTime requires an applicable data plan and call recipients must also have an iOS device w/ FaceTime.
   
2. To turn FaceTime on, select Settings > FaceTime. 
   
3. To make a FaceTime call, select Contacts.
   
4. Select a Contact name, and select the FaceTime icon to make a video call.
   
5. When receiving a FaceTime call, you can Accept, Decline, or respond with a text message by selecting the Message icon.
   Note: Learn more from Apple support article: Contacts: Make a video call. If you need additional help, view Apple support article: Get help if you can't make or receive FaceTime calls