How to choose which FaceTime number to call I have a friend with two iPhones, two different numbers.  When I call her with FaceTime audio, only phone A rings.  How can I call phone B?  The phones have two separate Apple ID addresses, but they are both set to receive Facetime calls on their 10 digit phone numbers.  I have both numbers listed in my contacts as 'Home' and 'Work' for the same person.
I'm not sure there is a standard way. It certainly isn't easy to find by using the Contacts or the Facetime app. But, it can be done:


Send a text message to the specific number you want to Facetime
call.
Open the conversation thread.
Click "Contact" in the top right.
Click the symbol for calling.
Choose "FaceTime Audio".