BTV-W09 (WiFI-only tablet) No ring sound when "calls" come in

[WageSlave010101]

Ok, so I got this tablet for the kid a couple years ago and now that she's getting older, I realize there's an issue. When Facebook messenger, Hangouts, etc. calls come in there is no ring sound, despite the "ringtone" volume being turned up. So... This is a WiFi-only tablet... Would that possibly mean the ROM just doesn't support such a thing? It makes the thing a lot less useful. I can't even get it to make sound when I do the Google "Find my Phone: deal, which I would really like to be able to do, being that the thing is constantly misplaced. So, would anyone here have any idea what I could do to get the thing to ring? Thanks for your help, I appreciate it very much.