A noble goal, and i wish you could, but as far as i know that's controlled in the engine and not something we can alter. The cell phone code doesn't control timeouts. It just reads the state of whether they're available directly from the engine, and calls an internal function when you choose a name on the list: cellphone_dial(homie_index, "cell_phone_dial_connection_cb", "cell_phone_call_hangup_cb")