Hi. I already have ringtones that I downloaded from elsewhere and I want to add them to my itunes and sounds on my phone. I have tried many different ways to add them but they are just not working. They are listed in my music folder so I guess they are already m4a formated. I do not know how I am supposed to change them into the m4r format. I bought them as mp3 and added them to itunes which converted them to m4a. What should I do to convert them to m4r and add them to my phone under sounds?