Abstract: Techniques that enable wireless client devices to more efficiently utilize available transmission bandwidth in a wireless network are disclosed. In one embodiment, the techniques operates to include or incorporate return information (data) in an acknowledgement message after an incoming message has been successfully received from a sender. As a result, messages are able to be effectively sent over the wireless network with less overhead. The techniques are particularly suitable for a Global System for Mobile Communications (GSM) network that is capable of bi-directional communications with a short message service center (SMSC).