My Galaxy Tab S sometimes doesn’t recognize my fingerprint
Swipe the entire pad of your finger, from base to tip, across the home key to register your fingerprint properly. If you bend your finger or use a fingertip, the device may not recognize your fingerprints. Keep your finger flat against the home key and swipe at a moderate speed.
The fingerprint sensor is sensitive to moisture, so make sure both the screen and your fingertip are dry.
The Home button contains the fingerprint recognition sensor. To ensure that the Home button is not scratched or damaged, please avoid contact with metal objects, such as coins, keys, and necklaces.
To improve recognition perfromance, register fingerprints of the hand used most often to perform tasks on the device.
Swipe the entire pad of finger, from base to ti, across the home key to register your fingerprint properly.