Adding Fingerprint Security to Your Smartphone
Adding a fingerprint lock to your phone is a primary method for securing your device and enabling swift, personalized access. This biometric authentication replaces or supplements traditional passcodes and patterns, offering a blend of convenience and robust security. Modern smartphones employ advanced sensors, typically located on the back, side, or integrated directly into the display, to capture and verify your unique fingerprint.
The process generally involves navigating through your phone's security settings, selecting the fingerprint option, and following on-screen prompts to scan your finger multiple times from various angles. This ensures the sensor can accurately recognize your print under different conditions. Successfully registering your fingerprint allows you to unlock your device, authorize app purchases, and sometimes even log into secure applications with a simple touch.
- Access phone security settings to find the fingerprint option.
- Follow on-screen instructions to scan your finger repeatedly.
- Register multiple fingerprints for added convenience and backup.
- Always set a backup PIN, pattern, or password.
This foundational step is crucial for anyone looking to leverage the latest in mobile security technology. It's designed to be accessible, meaning most users can perform this setup without technical expertise. The goal is to make your phone as secure as it is responsive to your touch, ensuring only you can access your personal information.
Understanding the basics of how your phone's fingerprint scanner works can demystify the process. Whether you own an Android device or an iPhone, the underlying principles of capturing and storing biometric data are similar, albeit with slight variations in the user interface and specific menu locations. The critical aspect is ensuring the scanner has a clear, accurate reading of your digit to prevent failed unlock attempts and maintain data integrity.
Understanding Fingerprint Sensor Technology
Most smartphones today utilize one of three primary types of fingerprint sensors: capacitive, optical, or ultrasonic. Capacitive sensors, the most common, use an array of tiny capacitors to map the ridges and valleys of your fingerprint. When you place your finger on the sensor, it measures the capacitance between the sensor and your skin, creating a digital image. Optical sensors, often found under the display, use light to capture an image of your fingerprint, similar to how a camera works. Ultrasonic sensors, also typically under-display, emit ultrasonic pulses that map the contours of your fingerprint with remarkable accuracy, even through contaminants like water or grease.
The quality and placement of these sensors can vary significantly between device models and manufacturers. Some phones boast faster, more reliable sensors than others, impacting the overall user experience. Regardless of the technology, the setup process aims to gather enough data points from your fingerprint to create a secure profile that your phone can reliably match against when you attempt to unlock it.
Why Secure Your Phone with Fingerprints?
The primary advantage of using a fingerprint lock is the unparalleled combination of security and speed. Your fingerprint is unique to you, making it significantly harder for unauthorized individuals to gain access compared to guessing a simple passcode. Furthermore, the physical act of placing your finger on a sensor is often quicker and more intuitive than typing a complex password or drawing a pattern, especially when you need to unlock your phone in a hurry.
Beyond unlocking your device, fingerprint authentication is increasingly used to authorize payments via mobile wallets, sign into secure applications, and confirm identity for sensitive transactions. This broad application transforms your fingerprint into a versatile digital key, streamlining interactions and reinforcing the security of your mobile life. This capability means fewer passwords to remember and a more secure digital footprint.
Preparing to Add Your Fingerprint
Before you begin the process of adding your fingerprint to your phone, a few preparatory steps can ensure a smoother and more accurate registration. The accuracy of the fingerprint scan is paramount for reliable unlocking, so taking a moment to prepare can save you frustration later.
Ensure Your Finger is Clean and Dry
The most critical factor for successful fingerprint registration is the condition of your finger and the sensor itself. For most sensors, especially capacitive and ultrasonic types, moisture, dirt, or oils on your finger can interfere with the scanning process, leading to failed readings or an inability for the phone to register your print accurately. Similarly, if the sensor surface is dirty or smudged, it can produce inaccurate results. Therefore, before you start, wash your hands and dry them thoroughly. Also, wipe the fingerprint sensor with a clean, soft, dry cloth (like a microfiber cloth) to remove any debris or smudges.
This attention to cleanliness is not just for the initial setup but also for everyday use. Keeping both your finger and the sensor clean will ensure consistent and reliable unlocking performance whenever you need to access your phone.
Choose Which Finger(s) to Register
Most phones allow you to register multiple fingerprints. It's wise to register the finger you most commonly use to unlock your phone, typically your index finger or thumb. However, consider registering a second finger for convenience. For example, if your primary hand is occupied, you can use a finger from your other hand. Some users register fingers from both hands to offer maximum flexibility.
When registering a finger, try to capture different parts of it: the tip, the side, and the pad. The phone's software will prompt you to lift and reposition your finger multiple times, and this is your opportunity to ensure all key areas are scanned. This comprehensive scanning increases the chances of the sensor recognizing your print, even if the angle or pressure varies slightly during normal use. Some advanced users even register the same finger twice, especially if they find their primary finger can be prone to smudges or damage.
Set Up a Backup Screen Lock Method
It is absolutely essential to set up a backup screen lock method before or during the fingerprint setup process. Fingerprint sensors, while generally reliable, can sometimes fail to read your print, especially in extreme conditions (e.g., very wet or dry fingers, sensor damage). If you haven't set up a backup, you could be locked out of your phone. Most phones will prompt you to set up a PIN, pattern, or password as a fallback option when you first enable any biometric security like fingerprint or face unlock.
This backup method serves as a secure alternative when your fingerprint cannot be recognized. It's also used after restarting your phone, as most devices require you to enter your primary passcode after a reboot for security reasons. Ensure this backup method is something you can easily remember but is still strong enough to deter casual snooping. A forgotten backup lock could lead to the need to factory reset your phone, erasing all your data, which is precisely what fingerprint security aims to prevent. This backup is critical, especially if you find yourself trying to figure out how to reset a phone when you forgot the password.
Step-by-Step: Adding Fingerprint on Android Phones
The process for adding a fingerprint to an Android phone can vary slightly depending on the manufacturer (Samsung, Google Pixel, OnePlus, etc.) and the specific version of Android it runs, but the core steps remain consistent. This guide outlines the typical procedure you'll encounter.
Navigate to Security Settings
The first step is to locate your phone's security settings. Typically, you can find this by opening the main 'Settings' app. Scroll down and look for an option labeled 'Security,' 'Biometrics and security,' 'Lock screen,' or something similar. Within this menu, you should find an option specifically for 'Fingerprint' or 'Fingerprint Unlock.' Some manufacturers might place this under 'Face & Fingerprint Unlock' or similar combined biometric settings.
Once you've found the fingerprint section, you will likely be prompted to enter your existing PIN, pattern, or password to confirm your identity before proceeding. This is a standard security measure to ensure that you are the authorized user making changes to the device's security features. If you haven't set up a screen lock yet, the phone will guide you through that process first, as it's a prerequisite for fingerprint setup.
Initiate Fingerprint Registration
After confirming your identity, you'll see an option to 'Add fingerprint' or 'Register fingerprint.' Tap this to begin the scanning process. Your phone will then activate the fingerprint sensor and display instructions on how to place your finger on it. You'll be asked to place your chosen finger on the sensor, then lift it, and repeat this action numerous times.
Pay close attention to the on-screen prompts. The phone will guide you to reposition your finger slightly with each scan to capture different areas of your fingerprint, including the edges and tip. It's important to follow these instructions precisely. Try to press down firmly but not too hard, and ensure your finger covers the sensor adequately. The visual indicator on the screen will usually show your progress, filling up as more of your fingerprint is scanned.
Complete Registration and Add More (Optional)
Once the phone has captured sufficient data points to create a reliable fingerprint profile, you'll receive a confirmation that the fingerprint has been added successfully. At this point, you will usually have the option to 'Done' or 'Add another fingerprint.' If you wish to add more fingerprints (e.g., for your other thumb, or a finger from your other hand), select 'Add another.' It's recommended to add at least two or three fingerprints for maximum convenience and backup.
After adding your desired fingerprints, you can typically configure various settings related to fingerprint usage. This might include options for unlocking the device, authorizing app purchases, or accessing secure folders. You may also be able to rename each registered fingerprint (e.g., 'Right Thumb,' 'Left Index') to help you manage them later. If you ever need to remove a fingerprint, you can do so from this same settings menu.
When scanning, wiggle your finger slightly between taps to ensure the sensor captures the ridges and valleys from various angles, improving recognition accuracy.
Troubleshooting Common Android Issues
If you encounter issues, ensure your finger and the sensor are clean and dry. If your fingerprint isn't being recognized during setup, try a different finger. Some users find that certain conditions, like extremely dry skin, make it harder for the sensor to read their prints. In such cases, briefly rubbing your finger on your forehead or nose to add a tiny bit of natural oil can sometimes help improve contact and recognition. If the phone consistently fails to register a fingerprint, there might be a hardware issue with the sensor, or the chosen finger might have a cut or scar that disrupts its unique pattern, making it difficult for the system to read. In such scenarios, it's best to try another finger or seek support from the manufacturer.
Step-by-Step: Adding Fingerprint on iPhones
For iPhone users, the process of adding a fingerprint involves using Apple's Touch ID system. This feature is integrated into the Home button on older models or the side button on newer iPhones with Face ID (though Touch ID is also available on some iPad and Mac models). The steps are streamlined and intuitive.
Access Touch ID Settings
Begin by navigating to your iPhone's 'Settings' app. Scroll down and tap on 'Touch ID & Passcode.' You will be prompted to enter your iPhone's passcode to access these settings. If you have not yet set up a passcode, you will need to do so first, as it serves as the essential backup method for Touch ID.
Within the 'Touch ID & Passcode' menu, you will see options to set up Touch ID for unlocking your iPhone, for iTunes & App Store purchases, and for Apple Pay. To add a fingerprint, tap on 'Add a Fingerprint.' This action prepares your iPhone to begin the enrollment process for a new fingerprint.
Enroll Your Fingerprint
Once you tap 'Add a Fingerprint,' your iPhone will prompt you to place your finger on the Home button (or side button on models without a Home button, depending on the specific generation). Hold your finger in a natural position on the sensor. The screen will show a fingerprint outline that begins to fill in as the sensor captures data.
You will be instructed to lift your finger and then place it back down repeatedly. This iterative process allows Touch ID to capture the full contours of your fingerprint from multiple angles. Ensure you adjust your finger slightly between scans, as directed by the on-screen prompts, to ensure comprehensive data acquisition. The system needs to scan the center, edges, and tip of your finger for optimal performance.
Complete Setup and Add More
After the iPhone has successfully captured all the necessary data from your finger, you will see a confirmation message. You'll then have the option to continue scanning or to finish. If you wish to add more fingerprints (e.g., for another finger or hand), tap 'Continue' and repeat the enrollment process. It's recommended to add at least two or three fingerprints to ensure you always have a convenient way to unlock your device.
Once you've added all desired fingerprints, you can tap 'Done.' You can then review and manage your enrolled fingerprints from the 'Touch ID & Passcode' settings menu. Here, you can see a list of your registered fingerprints and choose to delete any that you no longer wish to use. You can also toggle which features Touch ID is enabled for, such as device unlock or App Store purchases.
For best results on iPhone, ensure your finger and the Touch ID sensor are clean and dry. If your skin is particularly dry, try moisturising it slightly before attempting to scan.
Troubleshooting Common iPhone Issues
If Touch ID isn't working as expected, first ensure your finger and the sensor are clean and dry. Restarting your iPhone can also resolve temporary software glitches. If you've recently updated your iPhone's software, try re-registering your fingerprints. Sometimes, minor cuts or scars on the finger can affect recognition. In such cases, try using a different finger. If Touch ID fails repeatedly, you may need to reset your Touch ID settings and re-enroll your fingerprints. Persistent issues might indicate a hardware problem, in which case contacting Apple Support would be the next logical step.
Maximizing Fingerprint Scanner Performance
Once your fingerprint is successfully registered, there are several strategies you can employ to ensure your phone's fingerprint scanner performs optimally, providing quick and reliable access whenever you need it.
Keep the Sensor and Your Fingers Clean
As stressed during the setup, maintaining cleanliness is key. A smudged, wet, or dirty fingerprint sensor can lead to failed scans, even if your fingerprint is properly registered. Likewise, if your finger is dirty, sweaty, or oily, it can prevent the sensor from accurately reading your print. Make a habit of wiping the sensor clean with a soft, dry cloth regularly and ensuring your finger is clean and dry before attempting to unlock your phone.
This simple practice is the most effective way to prevent unlock failures. It also contributes to the longevity of the sensor, as abrasive materials or excessive moisture can potentially damage its surface over time. For users who frequently work with their hands or are often in environments where their fingers might get dirty, this habit is particularly important.
Register Multiple Fingerprints Strategically
Don't limit yourself to just one finger. Registering multiple fingerprints is one of the smartest ways to enhance both convenience and reliability. Include the fingers you use most often, but also consider adding fingers from your non-dominant hand for situations where your primary hand is occupied or unavailable. Some users even register the same finger twice, perhaps from slightly different angles or with a bit more pressure during the second scan, to create a more robust profile.
This strategy is especially useful for busy individuals or those who use their phone in diverse settings. It ensures that no matter the situation, you have a readily available and recognized fingerprint to access your device. It also acts as a safeguard if one of your registered fingers incurs a minor injury that temporarily affects its print clarity.
Consider registering your dominant thumb and index finger, plus one finger from your other hand.
Understand Sensor Limitations
While fingerprint technology is advanced, it's not infallible. Extreme conditions can affect performance. Very cold temperatures can dry out your skin, making it harder for the sensor to read. Conversely, very wet or sweaty fingers can also cause issues. Some substances, like certain types of grease or mud, can obscure the fingerprint pattern more significantly than others. If you find yourself in such conditions, you may need to rely on your backup PIN, pattern, or password.
Also, be aware that significant damage to a finger, such as a deep cut or burn that alters the fingerprint's natural pattern, can prevent recognition. If a registered finger is permanently altered, you will need to remove that fingerprint from your phone's settings and register a different one. Understanding these limitations helps manage expectations and prevents frustration when the technology doesn't perform as expected due to external factors.
Keep Your Phone's Software Updated
Manufacturers often release software updates that include improvements to biometric performance. These updates can refine the algorithms used for fingerprint recognition, making the scanner faster, more accurate, and more reliable. Ensure your phone's operating system is kept up to date to benefit from these enhancements. Regularly check for system updates in your phone's settings menu and install them when available.
Software updates can also patch security vulnerabilities, ensuring that your biometric data remains protected. By keeping your phone's software current, you not only enhance the functionality of your fingerprint scanner but also maintain the overall security posture of your device. This proactive approach to software maintenance is a critical aspect of modern smartphone security management.
Managing Your Fingerprints
Once you've set up your fingerprint lock, managing these registered prints is a straightforward process within your phone's security settings. This allows you to keep your security profile clean and up-to-date.
Accessing Fingerprint Management
To manage your fingerprints, you'll need to return to the security settings menu where you initially added them. On Android, this is typically found under 'Settings' > 'Security' > 'Fingerprint.' On iPhones, it's 'Settings' > 'Touch ID & Passcode.' You will be required to enter your backup PIN, pattern, or password to access these options, ensuring only the authorized user can make changes.
This step is crucial for security. It prevents anyone who might gain physical access to your unlocked phone from tampering with your biometric security settings. It reinforces that your PIN, pattern, or password remains the master key to controlling all security features, including your fingerprint data.
Renaming Fingerprints
Most smartphones allow you to name each registered fingerprint. This is particularly useful if you've added several prints. Naming them clearly, such as 'Right Thumb,' 'Left Index,' or 'Partner's Finger' (if you've shared access responsibly), helps you keep track of which print belongs to whom and which finger is being used. This can be helpful if you need to delete a specific print later or if you're troubleshooting recognition issues.
The renaming option is usually available when you view the list of registered fingerprints in the security settings. Simply tap on the fingerprint you wish to rename and select the rename option. This small organizational step can significantly improve your ability to manage your device's security features efficiently.
Deleting Unused or Unrecognized Fingerprints
If a registered finger becomes injured, or if you simply want to remove a fingerprint for any reason, you can easily delete it from your phone's settings. Go to the fingerprint management screen, select the fingerprint you wish to remove, and then choose the 'Delete' or 'Remove' option. You will likely need to confirm this action, and sometimes re-enter your backup password for security.
It's also a good practice to periodically review your registered fingerprints. If you notice that a particular registered print is no longer being recognized reliably, it might be worth deleting it and re-registering it. This can refresh the data and improve recognition accuracy. If you've shared your phone with someone and have previously added their fingerprint, ensure you remove it when it's no longer needed.
Regularly review your registered fingerprints and delete any that are no longer in use or are causing recognition issues.
When to Re-register Fingerprints
There are several scenarios where you might consider re-registering your fingerprints. If you've had a significant cut, burn, or other injury to a finger that has altered its print, you'll need to delete the old registration and add the finger again once it has healed. If you find that your phone is consistently failing to recognize a registered fingerprint, deleting and re-adding it can often resolve the problem by creating a fresh, potentially more accurate, profile.
Another reason might be after a major software update on your phone, as sometimes these updates can affect biometric performance. While not always necessary, re-registering can ensure optimal performance. Also, if you've previously registered a fingerprint and now find it difficult to use due to frequent unlock failures, it's wise to remove it and re-add it, paying closer attention to the scanning process to capture more data points.
Common Pitfalls and How to Avoid Them
While setting up a fingerprint lock is generally straightforward, certain common pitfalls can hinder the process or affect its performance. Being aware of these can help you avoid them and ensure a seamless experience.
Pitfall 1: Incomplete or Inaccurate Fingerprint Scan
The most frequent issue is an incomplete or inaccurate scan during the registration process. This happens when the user doesn't follow instructions precisely, doesn't reposition their finger enough, or has a dirty/wet finger or sensor. An incomplete scan means the phone doesn't have enough data points to reliably recognize your fingerprint, leading to frequent failed unlock attempts.
Avoid this by ensuring your finger and the sensor are clean and dry, and by carefully following the on-screen prompts to reposition your finger for each scan. Take your time and don't rush through the enrollment process. If the phone fails to register, try again with a different finger or ensure you're applying consistent, appropriate pressure.
Pitfall 2: Neglecting to Set a Backup Lock
A critical mistake is failing to set up a backup PIN, pattern, or password. As mentioned earlier, fingerprints aren't always recognized, especially after a phone restart, or if the sensor is damaged or obscured. Without a backup, you could permanently lose access to your device if the fingerprint fails too many times or if the sensor breaks. This is particularly concerning if you forgot phone lock password and didn't have a biometric backup.
Always set a strong, memorable PIN or password as your primary backup. This ensures that even if your fingerprint fails, you can still access your phone. This also applies if you ever find yourself in a situation where your phone was factory reset and you need to enter a PIN to proceed; having that fallback is crucial.
Pitfall 3: Registering Only One Finger
While you can technically use just one finger, registering only one is a limitation. If that finger is injured, dirty, or simply not available (e.g., wearing gloves), you'll be forced to use your backup. This reduces the convenience factor that fingerprint unlocking is designed to provide.
To avoid this, take advantage of the option to register multiple fingerprints. Registering at least two or three fingers, including those from both hands, provides greater flexibility and ensures you can always unlock your device quickly and easily, regardless of circumstances.
Pitfall 4: Ignoring Software Updates
Manufacturers frequently release software updates that include improvements to fingerprint recognition algorithms. Ignoring these updates means you might be missing out on enhanced performance, greater accuracy, and improved security for your fingerprint scanner. Outdated software can also sometimes lead to glitches or compatibility issues.
Make it a habit to check for and install software updates regularly. These updates are typically found in your phone's 'Settings' under 'System' or 'Software Update.' Keeping your phone's software current is vital for optimal functionality across all features, including biometric security.
Pitfall 5: Using a Damaged or Dirty Sensor
Attempting to use a fingerprint sensor that is physically damaged (scratched, cracked) or covered in debris will invariably lead to recognition failures. The sensor needs a clear, unobstructed surface to function correctly. If the sensor itself is damaged, it may require repair or replacement.
Ensure the sensor surface is always clean and free from obstructions before attempting to unlock your phone. If you suspect the sensor is physically damaged, consult your device's manufacturer or a qualified repair service. Do not attempt to clean a damaged sensor with harsh materials, as this could worsen the problem.
Advanced Fingerprint Security and Privacy
Beyond the basic setup, understanding how your fingerprint data is stored and protected is crucial for appreciating the advanced security and privacy measures implemented by smartphone manufacturers.
How Fingerprint Data is Stored
When you register your fingerprint, the phone doesn't store an actual image of your fingerprint. Instead, it captures unique characteristics (minutiae points like ridge endings and bifurcations) and converts them into a mathematical template. This template is then encrypted and stored securely in a dedicated, protected area of the phone's hardware, often referred to as a Secure Enclave (on iPhones) or a Trusted Execution Environment (TEE) on Android devices. This encrypted data is isolated from the main operating system, making it extremely difficult for malware or unauthorized access attempts to retrieve or compromise.
This robust storage method ensures that even if your phone's main operating system is compromised, your fingerprint template remains protected. The phone's software can only access this secure storage to perform comparisons; it cannot read the raw fingerprint data itself. This design is fundamental to maintaining user privacy and security.
Privacy Concerns and Safeguards
Privacy is a significant consideration with biometric data. However, the systems are designed with privacy in mind. Because only a mathematical template is stored, and not the actual fingerprint image, it's virtually impossible to reconstruct your fingerprint from the stored data. Furthermore, this template is specific to your device and is not shared with third-party apps or cloud services unless you explicitly grant permission for a specific function (like app purchases). The data resides locally on your device within the secure hardware.
For example, when you use fingerprint to authenticate an app purchase, the phone sends a request to the payment system, and your device's secure element verifies your fingerprint locally and sends back a confirmation of authentication, not the fingerprint data itself. This process ensures that your biometric information is handled with a high degree of privacy and security, making it a safer alternative to remembering numerous passwords.
Fingerprint Authentication vs. Traditional Locks
Comparing fingerprint authentication to traditional locks, like PINs or passwords, highlights its advantages. While a PIN or password can be forgotten or observed by others, a fingerprint is unique and physically tied to you. However, it's important to remember that no biometric system is 100% foolproof. Factors like extreme damage to a finger or advanced spoofing techniques (though very difficult and rare for modern sensors) could theoretically pose risks.
This is why the requirement for a backup PIN or password remains essential. It provides a fallback for situations where biometrics fail and serves as a crucial layer of security. It’s also the mechanism used to reset biometric data if necessary. The combination of a strong biometric like fingerprint and a secure, memorable passcode offers the most robust security for your smartphone. If you are struggling with password recovery, understanding these systems is vital.
When to Rely Solely on Fingerprint vs. Backup
You should rely on your fingerprint for everyday, quick access to your device. It’s the most convenient and secure method for frequent unlocking. However, you should always use your backup PIN, pattern, or password in specific situations:
- After restarting your phone: Most devices require your primary passcode after a reboot.
- After multiple failed fingerprint attempts: The system will lock out biometric access and require your backup.
- When your finger is compromised: If your finger is wet, dirty, injured, or the sensor is obstructed.
- For initial setup of new security features: Sometimes required to enable or configure biometrics.
Understanding these triggers ensures you are always prepared to access your phone securely, even when your fingerprint isn't the primary method. This layered approach maximizes both convenience and security.
Frequently Asked Questions
Here are answers to some common questions about setting up and using fingerprint locks on smartphones.
What is the best finger to use for fingerprint unlock?
The best finger to use is typically your dominant thumb or index finger, as these are most commonly used to pick up and unlock your phone. However, it's advisable to register multiple fingers for convenience, including fingers from your other hand, in case your primary finger is unavailable or compromised.
Can someone else put their fingerprint on my phone?
Yes, if they have physical access to your phone and know your backup PIN, pattern, or password, they can add their fingerprint. It's crucial to keep your backup lock method secret and to remove any unauthorized fingerprints from your device's security settings immediately.
How many fingerprints can I add to my phone?
Most smartphones allow you to add between 3 to 5 fingerprints. This limit is in place to ensure efficient storage and processing of biometric data. Check your device's specific settings for the exact number supported.
Why isn't my fingerprint being recognized?
Common reasons include a dirty or wet finger, a smudged sensor, incorrect finger placement, or significant changes to your fingerprint (like a cut or scar). Ensure both your finger and the sensor are clean and dry, and try repositioning your finger during recognition attempts.
What happens if my fingerprint fails too many times?
If your fingerprint fails multiple consecutive times, your phone will temporarily disable fingerprint unlock and require you to enter your backup PIN, pattern, or password. This is a security measure to prevent brute-force attacks on your biometric data.
Does fingerprint unlock drain battery?
Modern fingerprint sensors are very power-efficient. The battery drain associated with fingerprint unlock is minimal, especially compared to keeping your screen on constantly. The sensor is only active when actively being touched or when the phone is waking up for a fingerprint scan.
Can I use fingerprint unlock if my phone screen is broken?
It depends on the location and type of damage. If the fingerprint sensor itself is damaged or covered by the broken screen, it likely won't work. You would need to rely on your backup PIN or password to access your phone, and then potentially get the screen or sensor repaired.