I'm looking to communicate, to a chat user, that their chat partner is available in the meaning of "has installed a chat application on their smartphone".
Marking the chat partner as "online" or "available" doesn't seem quite right - since they might be busy at the moment. Marking them as "offline" or "unavailable" is also not quite right - since they most likely will respond to messages, though probably with some delay.
Any thoughts? I know facebook uses a phone icon to mark this status.