FaceTiming an IPad user who does not own an iPhone

Hi thanks for the response. Unfortunately her number actually isn’t showing on the FaceTime->Settings page under “You can be reached by...” It only it shows her email address. Is there a way to add the phone number? She has an android phone. Thanks

So my friend has an IPad and an android phone. She is signed in on IMessages and Facetime on her Ipad. Settings->FaceTime->"You can be reach by FaceTime at..." shows a phone number under it and also an email address. She can make calls through that. Similarly other people can reach her by dialing her phone number in their FaceTime app. Messages->Settings->"You can receive messages and reply to" has no phone number listed under it. It only has an email address. When she places a call from the IPad messages app out, the caller id shows this email address. I can make an outgoing video call to this email address and successfully FaceTime her. However, when I go to her contact where her phone number is stored in my iphone and try to video call, the video call button is disabled. Other people try to do this as well and are not able to figure out how to place a facetime call to her due to the disabled button. I'd like to figure out how to hook this number up to her messages app so that contacts with the number stored have a video chat button that is enabled. Thanks

Fair enough, lol.