The File Extensions Database

.DM File Extension

  • Developer by: Sony Ericsson
  • Category: Audio Files

What is an .DM file?

.DM is DRM Delivery Message

File (often audio) that has been encoded with DRM (Digital Rights Management) copy-protection; used by some cell phones for ringtones and other media clips, but can also be used for digitally signed mobile applications; can only be opened using an authorized cell phone.

Normally DM files are installed in the background using a mobile phone download and installation service such as the online Nokia Ovi Store. However, sometimes users download DM files manually and save them to the desktop. For example, a user could save a Nokia Ovi Store .SIS or .SISX application file as a .SIS.DM or .SISX.DM file.

DM files can also be created with the DRM Packager Tool for Sony Ericsson phones.

Programs that open DRM Delivery Message
Sony Ericsson DRM Packager

How to solve problems with DM files

  • Associate the DM file extension with the correct application. On :
    Windows: Right click on any DM file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.DM files". Mac: Right click (or Ctrl-click) the DM file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .DM is DRM Delivery Message. Because only the current version supports the latest DM file format. Search, therefore, e.g. on the Sony Ericsson manufacturer website after an available .DM is DRM Delivery Message update.
  • To make sure that your DM file is not corrupted or virus-infected, get the file again and scan it with antivirus software.