I have a friend who lives in the UK and has an iphone 4s as well. I currently use skype to message him and sometimes skype isn't on so messages don't come. So I recently found out about associating apple id to iMessage. I have my friend already as a contact in my address book (I get 50 international minutes each month so I call him occasionally). My phone company charges 25 cents for each international message texted or received. So I want to somehow set up my apple ID with this friend so when I send a message, it goes to his apple ID and won't try to send to his phone number if apple id doesn't work or his wifi is off. This would make it so much easier and the UI on iMessage is so much nicer and easier to use. Can someone explain to me this procedure and what settings to alternate. I don't want to pay at all and I want the message to only go to the apple id, not actual cell phone number.