Face unlock uses facial recognition technology to securely unlock your device. When you look at your phone, a depth-sensing camera scans your face, capturing unique features like the distance between your eyes and nose. AI algorithms then compare this data to a stored facial model to verify your identity. Unlike fingerprint security, which relies on patterns of ridges and valleys on your finger, face unlock uses a 3D model for greater accuracy. It’s also more contactless and convenient, though fingerprint sensors may still be faster or more reliable in some scenarios, such as in low light conditions.