The Technical Details (https://www.amazon.com/Amazon-MW46WB-Introducing-Echo-Spot/d...) indicates a "Front Facing Camera".
I understand that Amazon wants to push their calling features but they're really of zero interest to me. Video calling is always a disappointing experience regardless of who is implementing it. The voice calling that only calls other Echo devices or POTS using an unknown number is also of little interest.
Personally I send any calls from numbers I don't know to voicemail, and I know many people who do the same. I would much rather have Alexa recognize my voice and use my phone to initiate calls.