We are migrating our phone service to Zoom Phone and they do not currently integrate with Keap.
I was searching for an alternative that we might use to initiate a quick call from Keap for convenience sake however the only business line service that is available is available through Pro and Max, both of which are not suitable for us.
The suggestion was to download an app for a 2nd business line through Keap, but I quickly found that was not an option for Max Classic