Alexa Drop In, Calling, Intercom and Announcements | Amazon.com
Amazon Alexa - Just say "Alexa, remind me to call mom on Mother's Day" and Alexa can make sure to remind you at your preferred time. Alexa even sends a notification to
How to use Amazon Alexa to make calls and send messages
Amazon enables free calls and messages on all Echo devices with Alexa Calling | TechCrunch
How to make voice and video calls using Alexa and your Amazon Echo | TechHive