upload you own ringtone that is at a higher volume.. you can take any mp3, wav, or m4a file and cut the part you want and the use something like cool edit pro or aduacity to raise the volume... but dont make it too much louder because it will crackle and pop on the speaker... then you can upload it to your phone with ring ring... download for ring ring below
http://www.modmyifone.com/forums/dow...o=file&id=1337