Table of Contents Compare Specs: Our Picks Side by Side How Face ID and Passkeys Actually Work Who Really Needs to Ditch Face ID? The data can unlock your device or help you log in to sensitive online accounts using a passkey. Depending on who you are and what you do, you may have more compelling reasons to stop using biometric data on your devices. Lockdown Mode is the reason why FBI agents have not been able to access Natanson’s phone data. (Credit: Google/PCMag)If you’re using devices running iOS, visit the Settings menu, then Face ID/Touch ID & Passcode, and tap either Reset Face ID or Delete Fingerprint.