The document discusses using cell phones and voice XML (VXML) to provide audio information tours for museums. It provides background on the history of audio tour technologies, such as wired handsets and MP3 players. It then describes how interactive voice response (IVR) systems can be used with cell phones to create audio tours, providing capabilities like text-to-speech and voice recognition. The pros and cons of the cell phone approach are discussed from the perspectives of both museums and visitors. The document concludes that cell phone-based technologies have a promising future for museum applications given the widespread adoption of mobile devices.