I have 2 echo dots which are successfully linked to call (1 in kid's cabin, other in kitchen - easy to call them for dinner!).
I bought a Fire 7 with Alexa (to put in my shed), but cannot get it to link in the same way (latest update is OS 18.104.22.168, all updated today). Looking at the Alexa app, there is no option to message. Any ideas please?