How to Fix Fingerprint Sensor Not Working on Android

Quick Answer

Quick Answer: If your Android fingerprint sensor is not working, start with simple checks: clean and dry your finger and the sensor, restart the phone, remove or replace the screen protector, and install available software updates. If fingerprint recognition still fails, delete the saved fingerprint and register it again. If you are locked out and cannot use your PIN, password, or pattern, you may need an official recovery method or a screen unlock tool for supported devices.

Why Is My Fingerprint Sensor Not Working on Android?

A fingerprint sensor can stop recognizing your fingerprint for several reasons. Some causes are easy to fix at home, while others may require repair support.

Possible Cause	What It Means	What to Try First
Wet, dirty, or oily finger	The sensor cannot read your fingerprint clearly.	Wash and dry your hands, then try again.
Dirty sensor area	Dust, sweat, oil, or debris blocks fingerprint reading.	Clean the sensor or screen area gently.
Screen protector issue	Thick or incompatible protectors may affect in-display fingerprint scanners.	Remove or replace the protector.
Finger injury or skin change	Cuts, scars, peeling skin, or dryness can change the fingerprint pattern.	Use another registered finger or re-register your fingerprint.
Temporary system bug	Android or the lock screen process may not respond correctly.	Restart the phone.
Outdated software	A system bug may affect fingerprint unlock.	Install available Android or security updates.
Fingerprint data mismatch	The saved fingerprint is no longer read accurately.	Remove and add the fingerprint again.
Hardware damage	The physical sensor may be damaged.	Contact the phone brand, carrier, or repair center.

If the fingerprint sensor is physically damaged, software fixes and screen unlock tools cannot repair the hardware. In that case, contact the phone manufacturer, carrier, or a trusted repair center.

Which Fix Should You Try First?

If you are not sure where to start, use the table below to choose the most relevant fix for your situation.

Situation	Best First Fix
Fingerprint fails only sometimes	Clean the sensor and re-add your fingerprint.
Fingerprint stopped working after installing a screen protector	Remove or replace the screen protector.
The phone says the fingerprint sensor is not responding	Restart the phone and install available Android updates.
Fingerprint unlock fails after a finger injury or skin change	Register another finger or remove and add the fingerprint again.
You forgot the backup PIN, password, or pattern	Use official recovery options or a screen unlock tool for supported devices.
Nothing works after all software fixes	Contact phone support or a repair center.

Before You Start: Try Your Backup Lock Method

Android fingerprint unlock is usually paired with a backup lock method, such as a PIN, password, or pattern. If fingerprint unlock fails, try your backup method first. Some phones also require your backup lock method after a restart, after multiple failed fingerprint attempts, or after a period of inactivity.

If you can enter the phone with your PIN, password, or pattern, follow the fixes below. If you forgot the backup lock method too, read

What If You Are Locked Out Because Fingerprint Unlock Fails? or check this related guide on

how to bypass fingerprint lock on Android .

Fix 1. Clean and Dry Your Finger and the Sensor

The easiest fix is to make sure your finger and the fingerprint sensor are clean and dry. Fingerprint scanners may fail when your finger is wet, oily, dusty, too dry, or covered by lotion.

Try this:

1. Wash and dry your hands.
2. Wipe the fingerprint sensor or screen area with a soft, dry cloth.
3. Remove dust, sweat, and oil from the screen or sensor.
4. Try fingerprint unlock again with steady pressure.

For in-display fingerprint scanners, also clean the screen area where the fingerprint icon appears. For side-mounted or rear-mounted sensors, clean the physical button or sensor surface.

Fix 2. Restart Your Android Phone

A simple restart can clear temporary system bugs that stop fingerprint unlock from responding correctly. This is a safe first step before changing security settings or resetting the phone.

To restart most Android phones:

1. Press and hold the Power button.
2. Tap Restart if the option appears.
3. If you only see Power off , turn off the phone and turn it back on.
4. Enter your PIN, password, or pattern if Android asks for it after rebooting.

After the phone restarts, try fingerprint unlock again.

Fix 3. Remove or Replace the Screen Protector

If your phone uses an in-display fingerprint scanner, the screen protector can affect fingerprint recognition. A thick, scratched, cracked, dirty, or poorly installed screen protector may stop the scanner from reading your fingerprint clearly.

Try this:

1. Clean the screen protector first.
2. Press your finger gently and evenly on the fingerprint area.
3. If it still fails, remove the screen protector and test fingerprint unlock again.
4. If fingerprint unlock works after removal, replace it with a compatible screen protector for your phone model.

Important: Remove the screen protector carefully. If you are not sure how to do it safely, ask a phone repair shop or accessory store for help.

Fix 4. Update Your Phone to the Latest Software

Software bugs can affect fingerprint recognition, especially after a system update, app conflict, or security patch issue. Installing the latest Android or security update may fix the problem.

General steps:

1. Open Settings on your Android phone.
2. Go to Software update , System update , or System > Software update .
3. Check for available updates.
4. If an update is available, connect to Wi-Fi and install it.
5. Restart the phone after the update.

Fix 5. Remove and Add Your Fingerprint Again

If your Android phone can still be unlocked with a PIN, password, or pattern, re-registering your fingerprint is one of the most useful fixes. This is also called recalibrating your fingerprint. It removes the old fingerprint data and lets your phone scan your finger again from different angles.

This method can help when the fingerprint sensor works only sometimes, takes too long to recognize your finger, or keeps saying that the fingerprint does not match.

Before You Re-Add Your Fingerprint

• Make sure your finger is clean and dry.
• Clean the fingerprint sensor or the in-display fingerprint area.
• Remove or clean the screen protector if you use an in-display scanner.
• Make sure you know your PIN, password, or pattern, because Android will ask for it before changing fingerprint settings.

How to Remove the Old Fingerprint

1. Open Settings on your Android phone.
2. Go to Security , Biometrics , Biometrics and security , or a similar option. The exact name depends on your phone brand and Android version.
3. Tap Fingerprints or Fingerprint unlock .
4. Enter your PIN, password, or pattern to confirm that you own the device.
5. Select the fingerprint that is not working well.
6. Tap Remove , Delete , or the trash icon.
7. Confirm the removal when prompted.

How to Add a New Fingerprint

1. Stay on the fingerprint settings page.
2. Tap Add fingerprint or Add another fingerprint .
3. Place your finger on the fingerprint sensor or the fingerprint area on the screen.
4. Lift and place your finger repeatedly as the phone scans it.
5. Change the angle slightly each time so the phone can capture the center, sides, and tip of your finger.
6. When the setup is complete, lock the phone and test fingerprint unlock again.

If you cannot access fingerprint settings because you forgot the PIN, password, or pattern, skip to

What If You Are Locked Out Because Fingerprint Unlock Fails? . You need to regain access to the phone before changing fingerprint settings.

Fix 6. Add the Same Finger More Than Once

If fingerprint unlock works sometimes but fails often, registering the same finger more than once may improve recognition. This gives Android more fingerprint data to compare when you unlock the phone.

Try this:

1. Open Settings .
2. Go to the fingerprint or biometrics settings.
3. Tap Add fingerprint .
4. Register the same finger again.
5. During setup, scan the finger from slightly different angles.

This method is helpful for users who often unlock the phone with one thumb or one index finger. You can also add another finger as a backup.

Fix 7. Turn on Touch Sensitivity for Supported Phones

On some phones with in-display fingerprint scanners, touch sensitivity settings may help if a screen protector affects screen input. This option is most commonly found on selected Samsung Galaxy models, but availability varies by device.

General Samsung path:

1. Open Settings .
2. Tap Display .
3. Find Touch sensitivity .
4. Turn it on.
5. Try fingerprint unlock again.

Fix 8. Factory Reset Your Phone as a Last Resort

A factory reset can remove software conflicts and reset system settings, but it should be used only after trying safer fixes. A factory reset erases data from the device, so back up your important files first.

Use this only when:

• Fingerprint unlock still fails after cleaning, restarting, updating, and re-registering fingerprints.
• You can access the phone and back up your data.
• You understand that a factory reset will erase local data.

General Samsung path:

1. Open Settings .
2. Tap General management .
3. Tap Reset .
4. Choose Factory data reset .
5. Read the warning carefully.
6. Enter your PIN, password, or pattern.
7. Tap Delete all or the equivalent option.

Limitations

• A factory reset can erase your data.
• It will not fix a physically damaged fingerprint sensor.
• After reset, you may need the Google account previously synced with the phone.
• The exact path varies by Android brand and version.

Fix 9. Contact Phone Support or a Repair Center

If none of the fixes work, the fingerprint sensor may have a hardware issue. This can happen after a drop, water damage, screen replacement, battery swelling, or internal component failure.

Contact:

• Your phone manufacturer’s official support team.
• Your carrier if the phone is under a service plan.
• A trusted repair center.
• The store where you bought the phone if it is still under warranty.

Do not keep factory resetting the phone if the sensor is physically damaged. Hardware repair or inspection is usually the better next step.

What If You Are Locked Out Because Fingerprint Unlock Fails?

If fingerprint unlock fails but you still remember the PIN, password, or pattern, use the backup lock method to access your phone. After that, remove and re-add your fingerprint.

If you forgot the backup lock method too, the issue is no longer only a fingerprint sensor problem. You need to regain access to the Android phone first. You can also read this related guide on

how to unlock a forgotten pattern lock if your main issue is the backup pattern.

Try these options first:

1. Use your PIN, password, or pattern if you remember it.
2. Check whether your phone brand provides an official recovery option.
3. Use your Google account or manufacturer account options if available.
4. If manual options do not work, consider a screen unlock tool for supported devices.

Tool-Assisted Option: Remove the Screen Lock If You Cannot Access the Phone

If fingerprint unlock fails and you also cannot use your PIN, password, or pattern,

DroidKit Screen Unlocker may help remove Android screen locks on supported devices.

DroidKit is designed to help remove Android screen locks such as PIN, password, pattern, fingerprint lock, and face recognition in supported scenarios. Before using it, check the current compatibility information and data-loss notes for your phone model. Screen unlocking may erase data depending on the device model, lock type, and unlock process.

When DroidKit May Be Relevant

DroidKit may be relevant when:

• You cannot unlock the phone with fingerprint.
• You also forgot the PIN, password, or pattern.
• Manual recovery options are unavailable or do not work.
• Your device is supported by DroidKit Screen Unlocker.
• You understand the possible data-loss conditions before unlocking.

DroidKit is not a hardware repair tool. It does not repair a broken fingerprint sensor. It is only relevant when you need to remove or bypass the screen lock in a supported scenario. For more tool options, see this guide to

Android phone unlocking software .

How to Use DroidKit Screen Unlocker

Step 1. Launch DroidKit and choose Screen Unlocker

Download and open DroidKit on your computer. From the main interface, choose Screen Unlocker .

Step 2. Connect your Android phone

Connect the locked Android phone to your PC or Mac with a USB cable. Then click Start .

Step 3. Click Remove Now

DroidKit will prepare a configuration file for your device. After it is ready, click Remove Now .

Step 4. Confirm your device brand

Select the correct device brand and follow the on-screen instructions. DroidKit may ask you to put the device into recovery mode and complete required steps for your model.

Step 5. Wait for screen lock removal to complete

Follow the instructions until the process finishes. When the lock removal is complete, DroidKit will show a completion message.

FAQs About Android Fingerprint Sensor Not Working

The Bottom Line

When your Android fingerprint sensor is not working, start with the safest fixes: clean your finger and sensor, restart the phone, remove screen protector interference, update Android, and re-register your fingerprint. If the problem continues, check whether it is a software issue, a fingerprint data issue, or possible hardware damage.

If you are locked out because fingerprint unlock fails and you also forgot the backup PIN, password, or pattern, DroidKit Screen Unlocker may be a tool-assisted option for supported devices. Check compatibility and data-loss notes first, and use it only on a device you own or are authorized to unlock.