10. The method of claim 9 , further comprising: upon determining that the degree of match is not above a predetermined threshold, forgo executing the command.
9. A method comprising: at an electronic device: while the device is in a locked state at a first time, receiving non-voice authentication information from a user; in response to receiving valid authentication information, transitioning the device to an unlocked state; while in the unlocked state, receiving a first speech input from the user; generating a voiceprint based on a voice sample of the first speech input; while the device is in a locked state at a second time, receiving a second speech input, the second speech input including a command associated with a restricted feature of the device; determining a degree of match between the generated voiceprint and the second speech input; and upon determining that the degree of match is above a predetermined threshold, executing the command including invoking the restricted feature of the device, wherein the command is executed while the device is in the locked state, and wherein the command is a request to perform an actin other than unlocking the device.