Hi! I just did a clean install of OS X El Capitan (build 15A282a) and I am unable to turn on iPhone cellular calls in FaceTime settings. The dialog says "FaceTime and iCloud must be signed in to the same Apple ID to use iPhone Cellular Calls." All of my devices are on the same iCloud account, and I have both a phone number AND an email address registered to my Apple ID. Any help would be greatly appreciated. Thanks!