Why doesn't two factor authentication work on my Gmail anymore?

Saren from Los Angeles, CA

Episode 1431 (2:07:03)

Google Authenticator

Saren hasn't been receiving the two factor authentication code he normally gets for his Gmail account. He would normally get it through his Google Voice number. Leo says it's insecure to send those two factor codes through SMS, because someone could spoof his number and get the text message. Google may have even stopped supporting SMS in favor of its Google Authenticator app.