So on my iPhone I have iMessage turned off and has been for a while. Yet I can't text one person cause it asks me to re-enable iMessage. Why would this be? I've texted others with iPhones with no problems. Thing is I got a message this morning from this one person and it came up on my Mac but not my phone. So I guess I had iMessage enabled on my Mac. But when I go to reply on my phone it won't let me unless I turn iMessage back on. How do I fix this so iMessage is off?