While registering make sure the finger fully cover the image of fingerprint displayed on the device. If you are using screen guard press slightly hard too.
I Had same problem.. don't listen to anyone. use your phone as it is and keep patients. register fingerprint after one day and keep patient. try for few minutes, wait for one hour restart your phone again try again and again. you just have register once. and once you register fingerprint is so so fast
Please perform the below mentioned steps to resolve the issue:
1) The device may not recognize fingerprints that are affected by wrinkles, small or thin fingers.
2) Ensure that the screen protector or the touchscreen on the fingerprint recognition sensor area is not scratched or damaged by objects, such as coins, keys,pens,and necklaces.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
