iPhone Calls on other devices not working
My phone, iPad and Mac share the same Apple ID. The phone XS setting Calls On Other Devices will not turn on. I get a box stating Cannot Turn On Calls On Other devices unless the same Apple ID. They are all on the same Apple ID. I only have one. Mail, photos, messages all show up on all devices. I don’t know why this started or how to fix it.
please advise.
iPhone XS, iOS 13