I have a Moto E(2nd Gen) phone. I read about new technology referred to as Adaptive Coverage technology or Bonded Calling under the Wifi Calling link. I located this information by going to the Home Page for Republicwireless Home page, clicking on the learn menu item on the top right hand side of this page. A drop down box opened and I clicked on ABOUT WIFI CALLING. This prompted me to ask myself, "Is Bonded calling available on my Moto E (2nd) phone.?
yes bonded calling is active on all 1.0/2.0 phones (and 3.0 phones also)