http://www.samsung.com/ca/products/shopserviceprovider/rogerswireless/sgh_a516zkbrwc.asp
found ur phone on the web... not having much luck other than that page which has no manual to DL or anything.

hmmm.... are you using Rogers??  Looks like you have to buy them if you are?
 http://www.rogers.com/ringtunes
you can copy/paste and fix this if you want the FAQ page - stupid long URLs make thread annoying.
http://shoprogersfaq.custhelp.com/cgi-bin/shoprogersfaq.cfg/php/enduser/
std_alp.php?p_sid=1nkXJoKi&amp;p_lva=&amp;p_li=&amp;p_page=1&amp;p_prod_lvl1=77&amp;p_prod_lvl2=%7Eany%7E&amp;p_search_text=
ring+tune&amp;p_new_search=1&amp;p_search_type=6&amp;p_sort_by=dflt

This probably won't help you much... but it's a forum dealing specifically with DRMed audio files.
http://club.cdfreaks.com/forumdisplay.php?f=129

from http://forums.afterdawn.com/thread_view.cfm/404035 - might be worth looking at.
[quote:484733771d]Jaeyen
Newbie
_ 	12. October 2006 @ 10:57
I'm a dealer for rogers, and i've noticed, It's not having to be unlocked as far as I've seen. I believe it actually needs to be flashed with the older software. The mp3 ringtune block was implemented to reinforce the sale of online ringtones. I know they usd to be able to use the Mp3,s but all the new handsets being produced have been blocked. [/quote:484733771d]