I'm not able to send an image with a text message on my iPhone 6. After selecting the recipient from contacts I select the camera icon to the left of the text field and select an image from my local images. The image appears at the top of the screen. Then I enter a text message and and hit the green uparrow. In a second I see a red message: "Not Delivered." This all repeatable. The person I'm sending the message to has an Android. Also, I 'm in range of a WiFi signal so I assume this is all going through WiFi and not Cellular. Does anyone know what might be going on?