Open the Play Store on your phone and search for cardav
Install the CardDAV-Sync free on your phone
After installation has finished open the app
Chose CardDAV in add account section
Fill in the information as it showed in the example just replace the Servername and Username and Password with your information
If you are a Computerisms customer fill and you received this Warning confirm that the issuer is Computerisms Certificate Authority than choose OK
Choose the addressbook or all of the addressbooks that you would like to add from the list(if you have multiple address books) than press Next
You can choose account name for your addressbook if you wish at this step tyhan you can press finished
You are now setup with the shared addressbook. Your contacts will automatically downloads from your addressbook to your android phone(if you have a already added contacts to your shared addressbook) or you can simply navigate to your contacts app and copy your contacts from your phone to this fabulous online service to keep a backup or share it with your other devices