The application Google Phone (beta) is now compatible with most Android devices. The call app is pre-installed on Pixel, Android One and select Xiaomi devices sold in the EU.
After that, you will be able to install the beta on your device. The application does not appear in its search results Play Store, so you will need to install it from the web using a direct link.
The application is compatible with Android devices running the Nougat version or a newer version of Android.
So you can install the application Google Phone on your device and set it as the default instead of the traditional mobile application. The call application reportedly works fine without any problems.
Unfortunately, you will not be able to access features such as Call Screen and Verified Calls at this time, as they are still exclusive to Google's Pixel series.