Deactivating a phone number from iMessage and FaceTime when you no longer have access to the number
My wife recently took out a SIM only contract with a new provider, due to the porting process the new SIM phone number was associated with her account (found through Siri according to the iPhone) for several days. After the SIM was ported to the new number we had to manually change her number under Apple ID but this still does not update the iMessage and FaceTime mobile number - so in attempting to remove the temporary number the process on the iPhone requires you to deactivate the number by it sending a message to the number you no longer want associated... so if we don't have the old number to receive the authentication code to remove it... how do we handle this?
A riddle wrapped inside an enigma.....
Please help...
iPhone 6s Plus