Alexa & Anymote
If you install the anymote app and add it as a skill in Alexa, you can use it to do voice Command over your Sonos. This appears to work the best when compared to alternatives. See the link below for anymote in the Play Store. I set mine up relatively quick today and it immediately worked. You may have to pay $6.99 for the full version.
https://play.google.com/store/apps/details?id=com.remotefairy4
https://play.google.com/store/apps/details?id=com.remotefairy4
