Apple has updated their status page to acknowledge that iMessage is suffering from downtime today.
“Users are unable to use iMessage. Normal service will be restored ASAP,” said Apple in a statement. “Users may be unable to place FaceTime calls. Normal service will be restored ASAP.”
This is not the first time that iMessage suffered from downtime. The same thing happened a few weeks ago and there was some instability of the service in September.