I've got a really dumb question. I just got my new (to me) iPhone 4 on a plan and activated through a service provider. Yay! My iPhone was restored to a backup of my iPod so all the data and stuff transferred, and in trying to text my mom (who is on an iPhone 5), all my texts come through iMessage unless I explicitly turn it off.
However my mom appears to be able to change messaging me between the two services on command. They all appear in the same conversation for me, but since all my messages are sent as iMessage, she has to switch to a different conversation (the iMessage one) to see my replies to an SMS.
Any idea why or how I might be able to prevent that?