Dave got an Amazon Echo Show for his mother in law and he wants to know how to call her with his. How can he make calls from one Show to another? Leo says she has to allow it. He also has to be sure both of them are on each other's Show contact list. Dave will need to know the name of her Show. Amazon has a good setup tutorial on how to do Drop Ins here.
Ron has a bunch of Echos all around his house but he can't use the intercom feature. Leo says he'll need to use the command "Drop in." He'll have to be sure they're enabled on each Echo and choose who can drop in as well. That's done in the Echo app. Leo says he'll need to sign up for Echo's calling and messaging as well, which is also in the app. His contact list will not sync with Echo, either. Leo says he'll have to sync his contacts to Google and then log into Google through the app.