This type file, DBK, was created by an application Sony Ericsson made called PC Suite to simply take care of cellular phones run by Sony Ericsson. What makes this application valuable to the Sony Ericsonn cell phone is it has the special ability to store items as zip compression files for the user to provide contact names and phone numbers. DBK files are often saved just in case the phone is taken or broken. DBK files can be opened by Sony Ericsson, FJ Software Development, My Phone Explorer, or Amrak Software Phone Miner. Compressed files can be opened with Microsoft File Explorer, Corel Winzip, or Apple Archive Utility.