[header] How to respond to incoming calls with a message on an iphone [title] Receive a call on your iphone. [step] You'll see the option to respond with a text message when you get an incoming call. [title] Tap the message button on the incoming call screen. 
[step] This looks like a message bubble, and can be found on the right side of the screen, above the slide to answer or accept button. [title] Tap one of the preconfigured messages.