Some of the features that come with Android's phone calls are:
Call history: You can see your recent and missed calls as well as your call log.
Voicemail: You can check your voicemails from within the app or on YouTube, Google Play Music, or Google Voice Search.
Phone calls: You can now make phone calls from within the app or on YouTube, Google. The app uses your device data to help you know when you have a missed call or voicemail, and it gives you the ability to access those messages quickly and easily.