How To Fix Samsung Galaxy Fingerprint Scanner Not Working (2026)

Your Samsung Galaxy fingerprint scanner suddenly rejects a finger it used to read instantly.

This is common and usually fixable at home, because the cause is most often a dirty sensor, a screen protector, or a software glitch.

This guide walks through the fixes in order, from 30-second checks to a service request, and should take about 15 minutes.

Why is my Galaxy fingerprint scanner not working?

Samsung lists the usual causes as a screen protector, wireless charging, a dry or poorly placed finger, outdated software, and physical or liquid damage.

What you notice	Likely cause	Try this
Fails only with the phone on a wireless charger	Charger interference	Fix 3
Stopped after you applied a new screen protector	Protector too thick or not compatible	Fix 5
Fails with dry or cold fingers	Finger condition	Fix 2
Misreads randomly, no pattern	Software glitch or outdated build	Fixes 6 and 7
Fails after a drop or water exposure	Hardware or liquid damage	Fix 10
Only some apps or situations fail	Third-party app or a setting	Fixes 8 and 9

Which fingerprint sensor does your Galaxy have?

Where you press depends on the model, and the sensor type changes which fixes matter most.

Sensor location	Example models (per Samsung)
In the display	Most Galaxy S models from S10 through S26, and A-series phones such as A35, A36, A56 and A57
Side button	Most Z Fold and Z Flip models and some A-series phones, including the A54 5G
Power button	Galaxy S10e and XCover6 Pro
Back of the phone	Galaxy S8, S9, Note8 and Note9, plus A11, A20 and A21

Samsung says screen protector problems apply only to under-display sensors, so side-button owners can skip Fix 5.

Fix 1: Clean the sensor and your finger

Wipe the sensor area and the fingertip so oil, sweat and dust do not block the scan.

1. Wipe the screen (or button) over the sensor with a clean, dry microfiber cloth.
2. Dry your hands, since Samsung asks for a clean, dry scanner and fingertip.
3. Try again, covering the whole sensor area with your fingertip.

On in-display models the sensor sits near the bottom centre of the screen.

Fix 2: Change how you press

A quick tap that ends before recognition finishes is a frequent cause of failed reads.

• Hold longer: keep your finger down until the phone finishes recognizing it.
• Cover the sensor: place your full fingertip over the sensor area.
• Dry skin: Samsung suggests a little hand cream or pressing more firmly.
• Match setup: hold the phone the same way you did when you registered the print.

Fix 3: Stop wireless charging and exit one-handed mode

Samsung says electromagnetic waves from a wireless charger can reduce fingerprint performance.

• Lift the phone off the wireless charger and try again.
• Turn off one-handed mode at Settings > Advanced features > One-handed mode.
• Disconnect Smart View from Quick settings if it is active, since Samsung notes both can change the sensor area.

Fix 4: Restart or force restart the phone

A restart clears temporary glitches and takes under a minute.

1. Hold the Side key and Volume down for more than 2 seconds.
2. Tap Restart.
3. If the menu does not appear, hold both keys for more than 7 seconds to force a restart.

After any restart you must unlock once with your PIN, password or pattern before the fingerprint works again.

Fix 5: Check the screen protector

Thick or non-Samsung protectors are a known cause on in-display sensors.

• Look for scratches, dirt or damage on the protector over the sensor.
• Samsung says thick, glass, silicone or textured protectors may stop registration or recognition.
• Remove the protector to test, or replace it with a thinner one made for your exact model.
• After applying any new protector, delete your fingerprints and register them again.

One review of ultrasonic sensors reports that glass thicker than about 0.33 mm can interfere, though some ultra-thin glass works.

Samsung also lists a Settings > Display > Touch sensitivity toggle for use with a screen protector.

Fix 6: Delete and re-register your fingerprints

A fresh scan can fix a print that has drifted from how your finger looks today.

1. Open Settings > Security and privacy > Lock screen and enter your PIN, password or pattern.
2. Tap Fingerprints, select a saved print, then tap Remove and confirm.
3. Tap Add fingerprint, then Register, and follow the prompts.
4. Tap Done.

You can register up to four fingerprints, so add a second angle of the same finger or a second finger.

Samsung also offers an Improve accuracy option under a saved fingerprint that asks you to scan the same finger 10 times.

On One UI 8 (Android 16), registration uses a swipe motion across the sensor in varied directions.

Menu names differ by model and software version, so on some phones the path starts at Settings > Lock screen and AOD > Screen lock and biometrics.

Fix 7: Update the software and apps

Updates can carry fixes for recognition bugs.

• Go to Settings > Software Update > Check for updates and install anything pending.
• Open the Play Store, tap your profile picture, choose Manage apps & device, then Update all.

If an update recently triggered other problems, our guide to Samsung Galaxy software lag after an update may help.

Fix 8: Test in Safe mode

Safe mode stops third-party apps from running, which shows whether an app is interfering.

1. Power the phone off completely.
2. Turn it on and hold Volume down as soon as the Samsung logo appears.
3. Look for Safe mode in the bottom-left corner, then test the sensor.

If it works there, remove apps you installed or updated around the time the problem began.

Restarting the phone exits Safe mode, though Samsung notes some customizations such as wallpapers may reset.

Fix 9: Run the Samsung Members fingerprint test

The built-in diagnostic tells you whether the hardware responds at all.

1. Open the Samsung Members app and tap Diagnostics.
2. Choose Phone diagnostics, then Fingerprint recognition.
3. Place your finger on the sensor when asked.

Samsung suggests running the full diagnostics first, stopping the test, then selecting the fingerprint test alone.

If the test fails even with a clean finger and no protector, treat it as a hardware fault.

Fix 10: Get service if nothing works

Physical or liquid damage needs a Samsung service center, according to Samsung.

• After liquid exposure, Samsung advises rinsing in clean water for 1 to 3 minutes, drying completely, and not connecting a charger until the phone is dry.
• Request service through your Samsung account: register the product, open My Page & Products, select the device, then click Request Service.
• Check warranty terms on Samsung’s warranty page before paying for a repair.

Do not factory reset just because of a fingerprint fault, since Samsung recommends setting up a PIN, pattern or face unlock as a backup instead.

Where are the fingerprint settings on my Galaxy?

Samsung documents these paths, and your menu labels may differ slightly by model and software version.

Task	Path
Add or remove a fingerprint	Settings > Security and privacy > Lock screen > Fingerprints
Improve accuracy	Fingerprints > select a print > Improve accuracy
Touch sensitivity with a protector	Settings > Display > Touch sensitivity
Turn off one-handed mode	Settings > Advanced features > One-handed mode
Fingerprint test	Samsung Members > Diagnostics > Phone diagnostics > Fingerprint recognition
Fingerprint always on (side or power button sensors)	Fingerprints settings, can be turned off to prevent accidental unlocks

How do I unlock the phone while the scanner is down?

Set an alternative method at Settings > Lock screen and AOD > Screen lock and biometrics and choose Pattern, PIN or Face recognition.

You will need that PIN, password or pattern after every restart and after 24 hours without unlocking, whatever the scanner does.

Related guides and official sources

• How to fix Galaxy S25 Ultra fingerprint scanner not working
• How to fix Galaxy S26 boot loop after update
• Samsung: troubleshoot fingerprint recognition issues
• Samsung: use the fingerprint sensor on your Galaxy