i have the same phone and i did figured it out...if you can usb it to your computer you can totally put ringtones on it and i mean the good ones not those crappy bell sounds lmao just hook it up to your computer and it should install automatically then find a good ringtone download site like
RINGTONES - Biggest Inventory of ringtones available online and download them stright to your phone!!! for free just be sure to save the files on to your phone!!!! i have about 24 that i downloaded then i ran out of memory!!!and yes they were all full songs!!!