text: Yes, they are legal, and in most cases, they do work, just like any other ringtone, you download them into the phone.  However, BEWARE of anything that is free.  I do technical support for one of the top three cellular phone companies, and our particular company's policy is to warn our customers about using these websites.  For several reasons,  one being that when you go to these website, you usually end up getting set up on some kind of monthly alert for new ringtones.  They come as text messages, and can cost you as much as $20 a month.  Also, your cell phone company should have a homepage, and links to downloads from that homepage.  Only those links from that home page are safe and protected from virus, worm, etc.  If you go to any other site on your phone, you are just as subject to pick up a virus as if you were on a regular pc.  I'm not saying they are all bad, of course.  Just use caution.