Samsung Rant M540
1. go to www.myxer.com
2. Upload ringtone.
3. Send to your phone.
4. Click on the text message from www.myxer.com, there should be a link they sent you, click on that and it should download automatically to your ringtones folder.
*This requires data.
1. Convert audio file to .3g2 (Make sure it is nice and short).
2. Put it in your pictures folder, the '101ssmed' folder.
3. Go to settings-> sounds-> incoming calls-> choose from my videos.