Biometric identification via voice is mostly hokum.

My education is in biometrics and our undergraduate seminar group had a student and his supervisor with essentially identical voices.

But that's just anecdata - the human voice doesn't carry a lot of unique information and on top of that it changes over time.

In biometric identification the iris is king. 3D face scans are a distant second, fingerprints on the border of usefulness and the rest like gait, voice, keystrokes etc. get rediscovered every decade or so just to, again, not yield results.

My employer had a project to look at phone unlocking with voice authentication. While we had a number of interesting techniques for anti-faking, the problem was the base error rate was about 1/10,000 even without adversarial considerations.

HSBC Hong Kong is actively promoting this. Just say "I will need your help with something" and you're in.