[Google Contacts] DAVx⁵ address books don't show up in the list

In some cases Google Contacts won't show any other address book accounts anymore.

Google Contacts has become very restrictive in the last years and third party address book accounts like the one from DAVx5 are maybe not displayed by default anymore. You have to disable Google Sync inside the app - then other address books on the system will show up and can be used again. 

• Click the profile picture. Expand the options.
• Select “use without an account”. You Google Contacts Sync will be disabled.
• DAVx5 address books will show up again in the list.

If you still have problems this might help, too:

• completely un- and reinstall Google Contacts or reset/wipe data of this app.
• or you need to trigger the access to these address books once. The easiest way is to install another contacts app: for example "Simple Contacts" from the Play Store. Once you opened it and showed the available address books, they will also show up again in Google Contacts [recommended].