how do I deregister a phone number from iMessage and Facetime if I do not have either the iPhone or the SIM?
I've changed employer and handed back the iPhone and SIM to my previous one but received a new iPhone and SIM from the new employer.
Under iCloud it appears that my old phone number is set as the iMessage and Facetime number and to remove it I have to "deregister" the number. To do this I either need to a) put the SIM back in the iPhone and change the settings, or send a code to the old SIM to deregister. My problem is that I have neither the phone nor the SIM to get the afore mentioned code. What is option 3?? Surely there are others in a similar boat when using the iPhone for business.