Google is removing the relatively insecure Voice Match security option from existing Android phones.
Previously, older Pixel and Moto phones offered the option to secure a phone with voiceprint and fully unlock it by saying “OK Google”. But the method wasn’t very secure; it could be fooled by a recording of the owner’s voice.
When users update to the newest version of the Google app, this option will be replaced by a new, limited Google Assistant interface on the lock screen. Its options include accessing certain email results, calendar events, contacts, reminders, and shopping lists. But other Assistant features like playing music will be unavailable without fully unlocking the phone via a different method.