Samsung’s Galaxy S series has evolved over the years, with each new model bringing improvements in both design and functionality. One of the most notable advancements in recent models is the inclusion of a fingerprint sensor, which provides enhanced security and convenience for users. However, like any technology, these sensors can sometimes malfunction, wear out, or get damaged over time, prompting the need for a fingerprint sensor replacement.
In this guide, we’ll walk you through how the fingerprint sensor works on different Samsung Galaxy S models, the possible reasons for its failure, and how to replace it if needed.
1. Samsung Galaxy S5
The First to Feature Fingerprint Recognition
Fingerprint Sensor Overview: The Galaxy S5 was the first in the Galaxy S series to feature a fingerprint sensor. Unlike the ultrasonic or optical sensors found in later models, the S5 had a swipe-based sensor integrated into the home button. Users could swipe their finger across the button to unlock the phone, make payments, and access secure content.
Common Issues:
The most common problem with the S5’s fingerprint sensor was that it became unresponsive or inaccurate over time. This could be due to dirt, oil, or wear on the sensor surface.
The swipe sensor sometimes failed to register properly, resulting in unlocking issues.
Replacement Process:
Tools Needed: Small screwdriver, prying tools, replacement home button with fingerprint sensor.
Steps:
Power off the phone and remove the back cover.
Unscrew and remove the battery.
Using a prying tool, gently detach the home button from the front of the phone.
Disconnect the fingerprint sensor’s cable from the motherboard.
Replace the home button and fingerprint sensor with the new one.
Reassemble the phone, ensuring all components are securely connected.
Given the relatively simple design of the fingerprint sensor in the Galaxy S5, replacing the sensor is a straightforward DIY project, though professional assistance is recommended for those unfamiliar with smartphone repairs.
2. Samsung Galaxy S6
The Move to a Physical Home Button Fingerprint Sensor Overview: With the release of the Galaxy S6, Samsung made a significant design change, incorporating a physical home button with a built-in fingerprint sensor. The sensor became more responsive and accurate compared to the S5, allowing for faster unlocking and smoother operation.
Common Issues:
Users have reported issues with the sensor failing to recognize fingerprints, especially when the sensor’s surface gets scratched or damaged.
A non-responsive sensor due to software glitches or hardware failures may also occur.
Replacement Process:
Tools Needed: Prying tools, small screwdriver, replacement home button with fingerprint sensor.
Steps:
Power off the device.
Use a prying tool to detach the screen from the phone’s frame. This step may require some heat to loosen adhesive.
Disconnect the battery.
Unscrew and carefully remove the home button.
Replace the damaged fingerprint sensor with the new one.
Reassemble the phone, ensuring all connections are secure.
The Galaxy S6’s fingerprint sensor replacement requires more delicate handling due to the use of adhesive to secure the display. If you’re not experienced with phone disassembly, it’s recommended to take it to a repair professional.
3. Samsung Galaxy S7 and S7 Edge
Refined Design and Sensor Accuracy
Fingerprint Sensor Overview: The Galaxy S7 and S7 Edge continued the trend of integrating a fingerprint sensor into the home button, but with more refined technology. These models also featured faster recognition speeds, and the sensor was designed to be more durable.
Common Issues:
Similar to the S6, issues with accuracy or failure to register fingerprints were the most common problems.
The sensor might fail due to software issues, dirt, or screen damage
Replacement Process:
Tools Needed: Pry tools, small screwdriver, new home button with fingerprint sensor.
Steps:
Power down the device.
Carefully heat the screen to loosen the adhesive and use a prying tool to detach it.
Disconnect the battery.
Unscrew the home button from the phone frame.
Install the new fingerprint sensor and home button.
Reassemble the phone carefully.
Like the Galaxy S6, replacing the fingerprint sensor in the S7 series requires careful handling of the screen, so professional help might be needed.
4. Samsung Galaxy S8, S8+, and S8 Active
– Introducing the Rear Fingerprint Sensor
Fingerprint Sensor Overview: The Galaxy S8 series marked a significant shift in the fingerprint sensor design. Instead of being integrated into the home button, the sensor was moved to the rear of the device, next to the camera module. This change was made to accommodate the Infinity Display, which eliminated the physical home button.
Common Issues:
Fingerprint recognition failures or sluggish response time.
Misalignment of the fingerprint sensor after accidental drops or physical damage.
Replacement Process:
Tools Needed: Small screwdriver, pry tools, replacement rear assembly with sensor.
Steps:
Power off the device.
Remove the back cover by heating the adhesive and using a prying tool.
Disconnect the battery.
Unscrew the rear camera module and fingerprint sensor from the body.
Replace the fingerprint sensor with a new one.
Reassemble the device.
Due to the rear placement of the fingerprint sensor, replacing it involves working with the back panel and camera assembly, which is a more complex task compared to previous models.
5. Samsung Galaxy S9, S9+, and S9 Active
Improved Fingerprint Sensor Placement
Fingerprint Sensor Overview: The Galaxy S9 series saw the repositioning of the fingerprint sensor to a more ergonomic location just below the camera module, making it easier to reach. This sensor was improved for quicker response times and better accuracy.
Common Issues:
Some users complained about occasional misreading of fingerprints or delayed recognition.
Like previous models, dirt or oil accumulation on the sensor could also cause problems.
Replacement Process:
Tools Needed: Prying tools, small screwdriver, replacement rear cover with fingerprint sensor.
Steps:
Power off the device.
Remove the back cover, using a prying tool and heat to loosen the adhesive.
Disconnect the battery.
Unscrew the camera module and fingerprint sensor assembly.
Replace the fingerprint sensor and reassemble the device.
This model’s fingerprint sensor replacement is similar to that of the Galaxy S8 series. The location of the sensor makes the repair a little easier than on previous models, but it still requires some expertise.
6. Samsung Galaxy S10, S10e, and S10+
Ultrasonic Fingerprint Sensor
Fingerprint Sensor Overview: The Galaxy S10 series introduced a groundbreaking change with the ultrasonic fingerprint sensor embedded beneath the display. This sensor uses sound waves to map the fingerprint, providing a higher level of security and faster recognition.
Common Issues:
The ultrasonic sensor is very sensitive, and issues such as misalignment, software glitches, or screen damage can affect its performance.
Users might experience slower response times if the sensor becomes dirty.
Replacement Process:
Tools Needed: Pry tools, small screwdriver, ultrasonic fingerprint sensor module.
Steps:
Power off the device.
Carefully remove the back cover and disconnect the battery.
To replace the sensor, the entire display assembly will need to be replaced, as the sensor is embedded within the screen.
Reassemble the phone with the new screen and fingerprint sensor.
Due to the embedded nature of the fingerprint sensor, replacing it is more complex than on previous models, often requiring a full screen replacement.
7. Samsung Galaxy S20, S20+, and S20 Ultra
Continued Use of Ultrasonic Fingerprint Sensor
Fingerprint Sensor Overview: The Galaxy S20 series continued with the ultrasonic fingerprint sensor under the display, offering even more refined security features and faster recognition.
Common Issues:
Sometimes users experience issues related to screen protector interference, causing the sensor to not register correctly.
Other issues could stem from software or hardware failures, or physical damage to the display.
Replacement Process:
Tools Needed: Pry tools, small screwdriver, replacement ultrasonic fingerprint sensor module or screen assembly.
Steps:
Power down the device.
Remove the back cover and disconnect the battery.
For this series, you’ll need to replace the screen assembly, which includes the embedded fingerprint sensor.
Reassemble the device with the new screen.
The replacement process for the S20 series is very similar to the S10, requiring careful handling and a screen replacement.
Conclusion:
Replacing the fingerprint sensor in the Samsung Galaxy S series can be a straightforward task on older models with physical sensors, but with newer models like the S10 and beyond, the process has become more complicated due to the embedded ultrasonic technology. For most users, professional help is recommended to ensure proper replacement and avoid damaging other components. Always remember that DIY repairs can void the warranty, so it’s essential to weigh the cost of professional repairs against the convenience of self-replacement.