How Do You Initiate A Discussion Using IMessage On An IPhone?

How can I turn on iMessage on my iPhone? Scroll through Settings until you locate "Messages" and hit it. Look for Messages in the Settings menu. Locate iMessage at the top of the screen. Find the iMessage toggle at the top of the screen. If the right-hand slider is green, iMessage is already turned on. If you don't see the slider, press it to activate iMessage.