So whenever I try to use FaceTime outside of wifi to make a video or audio call, it tells me: No Network Connection: Connect to a Wi-Fi or mobile network to use FaceTime and it gives me the option of going into Wi-Fi settings, Mobile settings or to cancel. I am a customer in good standing and my plan includes 1 GB of data, which I never use up, ever. I use Iphone 6 with the latest updates for carrier and iOS. So why doesn't it work?
You'll want to check your settings, go to settings>cellular, make sure your facetime in the list at the bottom of this screen isn't toggled off.