Never used that, and when I’ve called customer service sites like Spectrum, and others that claim they offer voice recognition for account identification, I’ve refused. I’ve never used Siri on my Apple devices or Alexa on my Kindles. I’ve made sure to turn those apps off whenever I’ve purchased a replacement device.
I used Google Voice for free long distance on a VOIP phone I bought for ten bucks. Google Voice came as one of the features of a gmail account.
My supposition was that they weren’t offering it for free out of the kindess of their hearts.