In the device log, you will see incoming and outgoing calls; the calls are registered with the secondary number, not the original caller or the number dialed.
This is in accordance with Google Play’s requirement that an app will not be able to make changes to call history on Android devices, as there is no change to IPhone devices.
The number that appears in the call log is the Secondary number defined in the app. The original caller or dialed number will not be exposed and will not appear in a call log.
For users who have purchased a package that includes calls in VOIP mode, calls made after activating VOIP mode will not appear in the device call log.