[pd1]

> maybe, they could check to see if a phone number supports imessage

Is that possible? I haven't touched iOS in a long time.

[function_seven]

It's possible through the UI. I'm sure it could be automated, though I don't know how.

When you send a text message from one iOS device to another, it will be blue if it was sent via iMessage, green otherwise.

Again, not sure how this could be automated en masse, but I'm sure it's possible.