LG Rhythm AX-585

I used to own many phones and NOT once have I had problems using my own music as ringtones until I purchased this phone! I am very upset that they locked the phones so that you cannot customize your own music with a ringtone that you have to PURCHASE them! I want to kow if there is any way to unlock/block this. It was one of the features I liked BEST about having a cell phone! Now they are taking this choice away! Whats going to be next?
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Fustrated!

Debra