dTunes is an iTunes equivalent for jailbroken iPhones and iPod Touches. It plays downloaded music and video files and torrents, and provides direct access to music and video sites for downloading files. You can only get dTunes from Cydia (on jailbroken iOS devices).
Development for the official version of dTunes has pretty much died, so it doesn't work iOS 4.0 (which a majority of people use nowadays). This is because dTunes relies on MobileTerminal. Development for the official version of MobileTerminal has also pretty much died.
If you want to use dTunes on iOS 4.0, you will have to download an alternative version by adding the source http://repo.insanelyi.com to Cydia. To add a source to Cydia, open Cydia and go to Manage->Sources->Edit->Add.
Development for the official version of dTunes has pretty much died, so it doesn't work iOS 4.0 (which a majority of people use nowadays). This is because dTunes relies on MobileTerminal. Development for the official version of MobileTerminal has also pretty much died.
If you want to use dTunes on iOS 4.0, you will have to download an alternative version by adding the source http://repo.insanelyi.com to Cydia. To add a source to Cydia, open Cydia and go to Manage->Sources->Edit->Add.