I purchased my blackberry curve on December 23 and have since then been trying to buy ringtones.
I get this message "You are not currently in an area that can handle data communication. As a result the browser cannot retrieve any web pages. Please try again when you are in a different location or contact your service provider if the problem persists."
I have tried when I am in "another location" and still get the message. I also get the message when i have full bars and there is not a problem with little or no service.
This problem does not lie only in the "Shop Tones" section but "MediaNet", Shop Games, Graphics, Themes, Multimedia, and Applications" as well.
I did not purchase the media package but on my old phone I didn't have the package but I could still buy ringtones.