All Amazon Echo devices can now make calls for free on North America to the U.S., Canada and Mexico

It has been quite a week for Amazon's Echo line up. Not only did Amazon revise the original Echo by adding a cloth cover, it made the new version of the original smart speaker shorter and fatter. The Amazon Echo Plus looks like the original Echo, adding improved Dolby sound and enhanced voice recognition. The addition of the ZigBee smart home hub makes it easier for users to control smart home products like entertainment systems, climate controls, locks and more. Other new models and accessories include the Echo Spot, the Echo Connect and Buttons.

Now, a new report published on Saturday ...