Is there any way to do this on iPhone? I use a Google Voice number since Google Voice came out, and I would love to iMessage from it, but Apple won't let me add it as a number for the device.
It only runs on Android for now, although I think a desktop version is on their roadmap. But also, Apple will refuse to register Google Voice numbers. You need a number tied to a real carrier account. You'd have to port your number into a carrier, do the registration, then port it back.
I believe all you need is an apple id with a valid email to use imessage. my devices sometimes ask me if I want to message from/to a number or an associated email. I could be wrong though.
