I set up an echo show for my dad. I can drop in on him easily however when my sister tries it says "not available"....or it drops in on my phone! He is blind and a bit forgetful so the drop in feature is amazing to check in on him!
I am assuming I set it up wrong but after hours of research can't figure it out. My mom would like to drop in from her ipad at home too....haven't even gone down that road yet....