Would Facetime Ring If Phone Is off?

If someone you're calling isn't connected to an Internet network, or if their phone is turned off, it might say they're unavailable, and FaceTime will ring for a much shorter amount of time.

How can you tell if someone's iPhone is turned off?

Often, if you're calling someone's phone and it rings only once then goes to voicemail or gives you a message saying something like "the person you have called is unavailable right now," that's a sign the phone is off or in an area with no service.

How do you know if someone's FaceTime is off?

If the person you're calling declines your call, it will tell you that they're unavailable as soon as they hit the button to decline your call. If someone declines your call, you'll get the same message as if someone was unable to answer your call.