Avoid the Samsung SGH d-807 cellphone if you are interested in the MP3 player function.  Here's why.  The phone will only play continuously on a 3 or 4 song playlist.  It will play single songs off the Sandisk but there is a loud electric spark sound in the earbuds each time you press play which you will have to do after every song.  The phone does not come with earbuds, or Sandisk so it will cost you extra to find out that your MP3 player doesn't really do what the sales person probably told you it would.

Also, I found the overall tone on phone calls to be less clear than on some of my previous phones.

It does slide open nicely and the camera seems to take good pictures.  If those things are important and you're not interested in MP3, you might consider this phone.