How add number to "send & receive"?
Our Verizon plan has 3 phones, mine, my daughter and my wife's. They are all under one Apple ID. All 3 numbers used to be in my phone under send & receive for messaging, but recently my daughter's number has disappeared. I would like to have access to her text messages, but now I cannot. When I go under "REACHABLE" in the settings of Apple ID setup on website, and try to add my daughter's number, it says "the phone number is already being used", and doesn't let me add the number, but the number is not there!!!
How can I add her number there so I can receive texts that go to her phone?
Thank you
iPhone 4S, iOS 10.1