1. A method for transmitting graphical images information between a wireless device and a server in a push-to-talk system on a wireless telecommunication network, comprising the steps of: displaying a predefined set of graphical images at a wireless device, wherein a graphical image is selected for transmitting to the server, the predefined set resident on the wireless device and each graphical image in the predefined set being identified by an image code and the predefined set being associated with a first image set code; receiving an indication of a selected graphical image at the wireless device, wherein the indication of the selected graphical image will be transmitted from the wireless device to the server via the push-to-talk system; selecting at the wireless device an image code corresponding to the indication of the selected graphical image; transmitting the image code from the wireless device to the server via a push-to-talk communication channel comparing the first image set code with a second image set code received from the server, the second image set code identifying another predefined set of graphical images; and if the first image-set code differs from the second image set code, sending a download request for new graphical images from the wireless device to the server.