Let's say you are imessaging someone and all of a sudden my messages sends as regular texts. Can it also mean the other person is talking on the phone? (He has verizon and so do I). Also, I'm wondering if the person is still on the phone (or doesn't have data connection), will it let you know that you are unable to send imessages before even sending anything? I noticed that for awhile, it said "Text message" in the inbox and the "send" button was green instead of blue. Usually, it will say imessage and the send button will be blue. What does this mean? Thank you.