I am currently on the at&t plan for my 4S, but I opted to not have any messaging plan (so that means it's $.20 a text). There is an option in preferences for iMessage that says to send as a text message if iMessage is not available (on the other device). I definitely don't want this checked. My question is, is there a way to send a text message other than through iMessage? I can't have a situation where I'm charged for a text when I think I'm using iMessage, but really I'm just texting. Can I have this option off in preferences but still text when I need to? Or is it all tied to iMessage? Thanks.