The other way to play free music on your Echo Dot is through a linked device such as a smartphone. Use a Linked Device to Play Free Music on Your Echo Dot
Regardless, setting up your Echo Dot to use a third-party music service is as easy as following the simple steps listed above. The ‘Link New Service’ feature includes many of the more popular music services, but it does not include all of them. Follow the wizard to add logins or set as default.Select your music provider from the list of remaining services.The items listed underneath are already usable. Choose “Link New Service” under the “SERVICES” section.Select “Settings,” then “Music & Podcasts” under the “ALEXA PREFERENCES” section.Open the Alexa app on your phone or computer.