CDB stands for contact database. This is used by Symbian mobile operating system to store phone database.
It is an on disk associative array which allows a number of values to be saved for a single key. Only two operations are possible on CDB file format which is read and create. Both of these operations are kept at high speed. CDB file format can be accessed by a number processes without any process locking the other. CDB file format is based on UNIX file system and therefore it is a reliable data storage format for database on Symbian mobile operating system.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .CDB file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .CDB file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .CDB file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .CDB extension. Directly on this website you can find a solution of the most common problem with the .CDB file – that you do not have on your computer the appropriate program to open the file.