I'm having this issue with Siri. Whenever I ask Siri to send a message to my Grandpa (or anyone with a non-iPhone), Siri sends it as an iMessage. I've looked at all the usual remedies (resetting Siri, turned my iPhone off/on) but it won't work correctly. I even told siri "Send a Text Message to Grandpa" but it always defaults to an iMessage. FYI: In my example, my Grandpa never has or ever had an iPhone associated with his number. He has had the same dumbphone for 4 years. Also, his number isn't listed as an iPhone in my contacts. Anyone else have the same problem?