System and methods for added authentication in distributed network delivered half-duplex communications

A wireless user device maintains wireless access via a public land mobile network and, while maintaining such wireless access, participates with one or more other devices in an instant communication session delivered via a carrier instant communications processing element of the public land mobile network. The session communications from the wireless user device are routed through a processing element of a private communication network for an assignment of a generic identifier to the session communications in place of a user identifier of the wireless user device, and then routed back to the public land mobile network to the carrier instant communications processing element for delivery to the one or more other devices in the instant communication session.