8 Easy Ways to Fix Fingerprint Scanner Not Working on Android Devices

Left image
Jide Mbaka

Fingerprint scanners not working on android devices have become a popular issue on many Android devices. The fingerprint sensor on android phones offer a convenient and secure way to unlock your phone or access certain apps.

However, sometimes the fingerprint scanner may stop working properly, and it can be frustrating to figure out how to fix it. In this article, we will discuss 8 easy ways to fix a fingerprint scanner not working on Android devices.

Why is my fingerprint scanner not working on android devices

Here are a few typical causes of fingerprint recognition failure. Find out if you fit into one of these situations by scrolling down.

1. Dirty or liquid-covered fingers

Make sure your hands are spotless because fingerprint readers need spotless surfaces to read the image you set on your fingertip to unlock the device. Dry your hands after washing them, then test your fingerprint to see if it's working.

2. Figures with scars or injuries

Accidents or hectic occupations can alter fingerprints noticeably, especially if they leave scars from labor-intensive employment or hand injuries.

These scars alter your fingerprint's original appearance by creating markings or lines on your finger that prevent your phone from being unlocked using your saved fingerprint.

In such situations, the majority of Android phones let users add up to five additional fingerprints to unlock their phones.

To finish it right away, take these actions:

  • Select Security under Settings.
  • Click the Fingerprint menu item.
  • Add another fingerprint.
  • Simply remove the previous fingerprint and add a new one for a quicker process.

3. The fingerprint reader can detect moisture or not

Similar to your figures, the fingerprint scanner needs cleaning. By often touching them, they pick up dirt and grease from your figures, which interferes with the scanner's ability to read your figure print correctly.

With a damp cloth dipped in alcohol or just plain water, clean your scanner or screen. To protect it from severe damage, avoid pressing against it or scratching it with hard or pointed objects.

4. A software flaw

Verify that your software is current. Installing these updates will keep your phones current and prevent fingerprint sensors from malfunctioning. Additionally, please roll back to the prior OS version if any problems arise after a software update.

Observe these steps to deploy critical updates:

  • Access the Settings app
  • Decide on System Update
  • Install and download necessary updates

5. If there is no hardware for fingerprints

If the fingerprint scanner on your Android device is still not working, it can be because the fingerprint hardware is not available. A certified technician from the service center like Carlcare for your phone must resolve this problem.

How to repair fingerprints sensor

1. Restart your device

One of the first things you should try when your fingerprint scanner is not working is to restart your device. This can often clear up any temporary glitches or issues that may be causing the problem. Simply press and hold the power button until the device turns off, then turn it back on again.

2. Check for software updates

Another simple solution is to check for software updates. Sometimes, updates may contain bug fixes or improvements that can resolve problems with your fingerprint scanner. Go to your device's settings, then look for the "software update" or "system update" option. If there is an available update, download and install it.

3. Clear the cache and data of the fingerprint scanner app

If your fingerprint scanner is still not working after restarting your device and checking for updates, you may need to clear the cache and data of the fingerprint scanner app. Go to your device's settings, then select "Apps" or "Application Manager." Find the fingerprint scanner app, then select "Clear cache" and "Clear data." This will reset the app to its original settings, which may fix any issues.

4. Remove and re-add your fingerprints

If clearing the cache and data of the fingerprint scanner app doesn't work, you may need to remove and re-add your fingerprints. Go to your device's settings, then select "Security" or "Lock screen and security." Under "Fingerprints," remove all of your fingerprints, then add them again. This can help resolve any issues with the fingerprint scanner's recognition software.

5. Check for physical damage

Sometimes, the fingerprint scanner may not work properly due to physical damage. Check the scanner for any signs of damage, such as scratches or dirt. If the scanner is dirty, clean it with a soft, dry cloth. If there is physical damage, you may need to have the device serviced or replaced.

6. Try using a different finger

Another common issue is that the fingerprint scanner may not recognize a specific finger. If you have multiple fingerprints registered, try using a different finger to unlock your device. If the scanner recognizes a different finger, the problem may be with the original finger's print.

7. Remove any screen protectors or cases

If your fingerprint scanner is still not working, you may want to try removing any screen protectors or cases you have on your device. Sometimes, these can interfere with the scanner's ability to read fingerprints properly. Remove the screen protector or case, then try using the fingerprint scanner again.

8. Factory reset your device

If none of the above solutions work, you may need to factory reset your device. This will erase all data from your device, so make sure to back up any important files before proceeding. Go to your device's settings, then select "Backup and reset" or "Reset." Follow the instructions to factory reset your device, then set it up again and try using the fingerprint scanner.


Fingerprint scanners are a convenient and secure feature on many Android devices, but they can sometimes stop working properly.

By following these 8 easy ways, you can fix a fingerprint scanner not working on Android devices. If none of these solutions work, you may need to visit any of our service center or book a Carlcare online reservation for further assistance.

About Carlcare

Carlcare is the Official After-Sales Repair Centre for TECNO Smartphones. We make use of original accessories only for repairs, and when you choose to repair at Carlcare you’re covered by warranty for a period (should the issue reoccur), unlike with other external repair options.