Tephelones (fairly off topic)

This is only on topic at all because I shall be using a classic computer for it... I understand that some mobile telephones nowadays can download tunes to play when they ring. Can anybody point me to (a) the download protocol(s) that the phones use and (b) the file format(s) for these tunes? Philip. ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. Power Technology Centre, Ratcliffe-on-Soar, Nottingham, NG11 0EE, UK Tel: +44 (0)115 936 2000 http://www.powertech.co.uk **********************************************************************