Routing text messages. A mobile message (MM) is received from an application program or other message source, and includes a destination identifier, such as a phone number. Based on the destination identifier, a routing server determines whether the MM is to be locally routed to a destination carrier, or forwarded to a remote server that provides access to the destination carrier. For local routing, the routing server determines a channel to the carrier based on predefined carrier information, the destination user information, and the carrier gateway dynamic information. The predefined carrier information indicates predicted availability or reliability of each of a plurality of channels to the carrier. The destination user information indicates availability of the destination user to receive messages, and includes a destination user criterion for determining one of the channels. The carrier gateway dynamic information indicates current and statistical traffic information for each of the channels.