As part of its unveiling of iOS 6, Apple has announced that the new OS will support FaceTime calls over cellular connections. As part of this feature rollout, the company will also be unifying users’ phone number and Apple ID, so that if a FaceTime call comes to a phone number, that user could answer the call on a Mac or iPad. This same unification will be used for iMessage, hopefully allowing for more streamlined interoperability between various…