How to fix dysfunctional fingerprint scanner on Android devices?

These days fingerprinting scanner is not something special. It is a often feature of economy class smartphones and not just an attribute of the flagship phones. A fingerprinting scanner serves to unlock your phone. It protects your device from unauthorized access. It is used as an option to secure certain applications. It is very handy and save solution. Unfortunately, it does the job until a scanner recognizes a registered fingerprint.

Possible causes for the issue
  1. Home touch button/fingerprint sensor has been damaged (when one opens the device on his own or after a hard break);
  2. Software dysfunction;
  3. Button surface is wet or dirty;
  4. Change of fingerprint pattern (it might be result of physical skin damage like its coarsen due to chilblain, chemicals, calluses).

How to fix the dysfunctional fingerprint scanner?
Tip 1: If you are sure that the button is damaged, take your device to a repair shop. Mostly repairmen manage to fix it.

Tip 2: Update your phone software. It is quite possible you missed important apps upgrades which led your device scanner to malfunction. If, contrariwise, your phone stopped working after upgrading, return to the previous version. You can reset factory settings (do not forget to save a reserve copy to secure entire information).

Tip 3: Damp (not soggy!) cotton swab wetted with alcohol and carefully wipe a button surface. Make it dry and check whether the sensor is working. Tap the button with clean and dry fingers.

Tip 4: It is a very effective way to delete a registered fingerprint. A fingerprinting scanner is not only getting right but also faster. Take the following steps:
  1. Remove the registered fingerprint;

  2. Go to "Settings" -> "Sound & vibration", turn off "Screen locking sounds";

  3. Return to "Settings" -> "Lock screen & password" and setup 2 minutes;

  4. Then enter fingerprints like that: first time touch the sensor with a dry finger, second time with moisten (not wet!) finger. As an option you can touch a moisten sponge first or just lick your finger.

As though it sounds ridiculous this method works and does it perfectly. It has been tested on Xiaomi smartphones.

Do you know other effective methods to make a fingerprinting scanner work? Tell us in Comments below how you have managed to teach your device scanner not "to be slow". Definitely your way will capture attention of our readers.

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Recent Comments

S
Try removing the screen lock PIN first and then deleting the Google account. That worked for me - did not have to factory reset the phone. But make sure to add back the screen lock PIN for security.
aneex
It's working on MIUI 9
Thanks for help me
Kenneth Liou
im having the same problem with a9 Pro, Samsung told me to format the phone but i really dont want too
César Augusto Lezcano Molinas
Y como se hace para instalar de la forma de sistema
Shum
I had same problem on my samsung galaxy A9 Pro. Followed the steps but could not fix it

I had same problem with my Samsung Galaxy A9 Pro. Tried the steps but could not fix it.
Is it software problem on android or samsung? Any other suggestions to fix it?