I recently purchased an iPhone 4S for my daughter. I turned off imessage on her phone as we have unlimited messaging. When I go to text her from my iphone it still shows up as she has imessage turned on with blue bubbles and my texts do not go through. This is her first and only idevice so there isn't a conflict with anything else. When I try to text from her iphone it works and shows up as green. I'm stumped. Help!