Continue reading...In the code of the application “Google Phone”version 25, lines were found that are responsible for the work of the dark theme, but so far it cannot be turned on from the settings. Resource XDA Developers has released instructions on how to activate the dark interface on their own.
Install Google Phone 25 directly or by entering the application beta
Install a file manager that works with root, for example, FX File Manager
Open the /data/data/com.google.android.dialer/shared_prefsdirectory from the root folder