Although you can't use your Echo for actual phone conversations, you can use it to initiate calls and check voicemail. And you don't actually need Ooma hardware.
If you own an Echo, it's now possible to use Ooma to place outgoing calls. In fact, you can do this even if you don't have the Ooma Telo hardware; you can set up a free Ooma account and enjoy up to 300 minutes per month of free calls (with a 1,500-minute lifetime maximum). Before we walk through setting this up, you should know the limitations of this option. Although you can instruct Alexa to dial a number (or a specific person, if you have nicknames set up in Ooma), the end result is merely the call being placed for you. Your phone (home or mobile) will ring, and once you answer, you'll hear the call going through. https://www.cnet.com/how-to/link-your-amazon-echo-to-your-ooma-phone-system/
