You can do this ,by contacting us at 1.888.4ONSTAR and selecting your contact preferences. We will also provide opt-out ,instructions in all of our promotional communication channels. for example, an unsubscribe option will ,appear at the bottom of all marketing-related emailsor you can reply “Stop” to unsubscribe from a ,specific text message campaign. ,Biometric Authentication,If you elect to use biometric authentication (e.g. Touch ID, fingerprint scanning, or Face ID) you should ,refer to your Device manufacturer’s product information regarding biometric authentication.