Crap, I might have gotten excited to soon. Darn Amazon developers could screw up an anvil with a banana peel! The Amazon Unlimited Music Individual plan works great on my iPhone in the RAV4, but as soon as I tried using it on my Echo it cannot even get through one bleeping song! It just keeps cutting out. Anyone else having issues with the Individual plan on an Echo, Tap, or Dot? When I go to my Music settings on Amazon.com I only see my iPhone and iPad listed as authorized devices. I cannot seem to get my Echo, Dot, or FireTV to show up on the list. WTF Amazon! The idea behind the Amazon Unlimited Music Individual plan is that it will not be limited to a single device but will be authorized for up to 10 of your compatible devices. I realize you can only listen on one device at a time, but that was what I was doing.

ETA: I re-connected the Echo to my WiFi and switched from a 2G to 5G network connection. That seems to have gotten the Unlimited to work on the Echo. Not sure why or if it was merely a coincidence. But I notice that while a radio station is playing on my Echo the Alexa app on my iPhone or iPad shows that it is offline. I guess they are enforcing the only one device at a time, though it would be nice to view the song info even if they don't allow sound through the second device. Also there is an Alexa app and a Amazon Music app. I seriously doubt they are coordinated very well, if at all. And dammit the darn bleeping thing just quit working again! It is cutting in and out quite regularly.