I'm wondering if there's anyone out there who has two iPhones and one Apple ID, as I am having problems with iMessage not activating on one. I was thinking that iMessage options for sending and receiving would be like this: Phone 1: Phone 1's #, Phone 2's #, Apple ID Phone 2: Phone 1's #, Phone 2's #, Apple ID However, my iPhones are like so: Phone 1: Phone 1's #, Apple ID Phone 2: Phone 1's #, Apple ID, Phone 2's # GREYED OUT Phone 2's number fails to activate. If it makes any difference, Phone 1 is an AT&T iPhone 4, and Phone 2 is an unlocked iPhone 4S (bought in the US), on Japan's NTT DoCoMo (an unsupported carrier). Prior to upgrading to iOS 6, I was able to send/receive messages on Phone 2 using Phone 2's phone number and Apple ID. I was also able to do so after upgrading, until I upgraded Phone 1 to iOS 6, and that is when Phone 1's number got "linked" to my Apple ID, and Phone 2's number will no longer activate. Is it possible to have two phone numbers linked, or unified, with one Apple ID?