Step 1 - make sure your phone is wap enabled, if in doubt check with your service provider.
Step 2 - Browse to http://wap.freepolyphonicringtones.eu.com using your mobile phone wap browser.
Step 3 - Enter the ID given on the results page, for example 158 is A C D C - You Shook Me
Step 4 - Hit enter and you will now be given a link to the free polyphonic ringtone.
Step 4 - Click on the link and your phone should now download it and give you the option to either play or save it.
Step 6 - Save the ringtone on your phone and then set it as your ringtone.