iMessage - having difficulty sending messages from my iPhone 4s to a friend with iPhone 5 on another carrier. It never gets delivered unless I explicitly ask to send it as a text message. This is a new problem.
I don't seem to have difficulty receiving messages from this same device, but every message I send to the iPhone 5 needs a second step where I send it as a text message. Any ideas on how to fix this so sending a message is a one stop process?
iPhone 4S, iOS 8.1