How to remove a fingerprint from the phone Xiaomi Redmi 9

Modern smartphones like the Xiaomi Redmi 9 offer users a high level of privacy protection, and one of the main tools here is a fingerprint scanner. This technology allows you to instantly unlock your device, confirm payments and log in to applications without having to enter a complex password every time. However, there are situations when you need to remove the stored biometric key: you handed over your phone to a family member, sold the device or just want to increase the level of privacy.

The process of removing a fingerprint does not require deep knowledge in programming or special tools, but it is important to follow the sequence of actions so as not to disrupt the operation of the MIUI security system. In this article, we will discuss in detail all available methods of managing biometrics, from simply removing one finger to completely resetting the scanner settings, as well as answering questions arising from sensor failures.

Why it may be necessary to remove biometrics

The main reason users decide to remove their fingerprint from the Xiaomi Redmi 9 is due to a change in the access status of the device. If the phone ceases to be your personal gadget and is transferred to another person, even temporarily, leaving your biometric data in the system memory becomes unsafe. Biometric data cannot be changed like a password, so deleting them completely is the only way to ensure that the former owner does not get access to the files.

Another common scenario is technical problems or inconvenience, sometimes the scanner gets malfunctioned due to contamination, software failures or damage to the security glass, in which case the system can misread someone else's fingerprints or, conversely, not recognize the owner, deleting old records and writing new ones often solves the problem of recognition.

Deletion is also necessary when selling a device, and even if you plan to do a full Hard Reset, security experts recommend manually removing the biometrics before that stage, which prevents the theoretical possibility of recovering data with specialized software, although this is unlikely in modern versions of Android, but this rule should not be neglected.

• 🔒 Transferring the device to another user requires cleaning up your personal biometrics.
• 🛠️ Failures in the scanner are often eliminated by overwriting fingerprints.
• 🧹 Selling the phone means removing all traces of the owner.

⚠️ Note: Deleting all fingerprints can automatically turn off the screen unlock function.Make sure you remember the pattern lock or digital key PIN-code, as they will be the only way to log in.

Preparing the device for changing security settings

Before you make changes to the security settings Xiaomi Redmi 9, you need to make sure that the device is charged and stable. the process of deleting data does not require an Internet connection, since all information is stored in a secure module of the processor itself, but the stability of the system is critical. If the battery is dead, the phone can turn off when the system security files are updated, which will lead to errors.

An important step is to check the current method of unlocking. MIUI, Biometric unlocking is always tied to the main method of protection – password, PIN-The master password is the master key, and without knowing it, it's impossible to change the biometrics settings.

If you forget your password, the procedure becomes more complicated, and simply removing your fingerprint through the settings menu will become unavailable, in which case you will have to resort to a complete reset of the device, which will delete all data, so before you start manipulating, make sure that you can unlock the phone in the standard way.

Also worth noting is the cleanliness of the scanner itself. On the back of the Redmi 9, the sensor is located under the logo or next to the camera. Fat marks or moisture can distort the reading process during settings, but this does not matter to remove the fingerprint, but a clean phone is the key to the right work in the future.

Step-by-step removal of the fingerprint through settings

The easiest and safest way to remove a fingerprint is to use the operating system’s regular settings menu, which allows you to selectively delete specific fingers while leaving others, which is convenient if you use a shared account or just want to replace one of your registered fingerprints.

To start, unlock your smartphone and go to the main menu. Find the Settings icon, which usually looks like a gear. In the list that opens, you need to find the security section. It may be called differently in different versions of MIUI firmware, but most often it is the Passwords and Security item.

Settings → Passwords and security → Unlock by fingerprint

Once you log in, the system will require you to verify your identity. PIN-Without this step, the biometrics control is closed to protect against unauthorized access. In the list that opens, you will see all the saved prints, usually numbered (Fingerprint 1, Fingerprint 2, etc.).

Click on the fingerprint you want to delete, and you'll see a detailed menu where you can access the delete button, which can look like a cart icon or a text link, Delete fingerprint, and then you click, the system will ask for confirmation of the action, and you'll agree, and the data will be permanently erased from memory.

• 📱 Go to the menu Settings of your smartphone.
• 🔐 Select the Passwords and Security section.
• 👆 Click on Unlock by fingerprint and enter the password.
• 🗑️ Select the unnecessary finger and press the delete button.

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If you remove the fingerprint to write it back for better recognition, it is recommended to register the finger at different angles of inclination to cover the entire area of the pad.

Managing Multiple Fingerprint Profiles

Xiaomi smartphones, including the Redmi 9, allow you to save up to 5 different fingerprints, a feature that is extremely useful for family use or in situations where one finger is damaged (for example, cut or burned) and it is temporarily impossible to unlock.

In the fingerprint management menu, you can rename profiles. Instead of the standard "Fingerprint 1", you'd better give a clear name, such as "Right Large" or "Left Index." This makes it easier to navigate when it comes time to delete a specific profile. To rename, click on the pencil icon or select the option to Rename in the menu of a particular print.

When you delete one of the five profiles, the rest of the profiles continue to work unchanged, the system does not require reconfiguring the remaining fingers, however, if you decide to delete all profiles at once, the system will warn you that the biometric unlock function will be completely deactivated until a new fingerprint is added.

⚠️ Note: The maximum number of fingerprints saved is limited to five.If the list is complete, the system will not allow you to add a new finger until you delete one of your existing profiles.

Complete reset of fingerprint scanner settings

In some cases, simply removing a profile from the list does not solve the problem, especially if there are software failures in the fingerprint sensor module. Then you may need to completely reset the biometric settings. It is important to understand that the standard MIUI menu does not have a single button "Reset all fingerprints", so this means sequentially removing all profiles or resetting security settings.

If you find that fingerprints are being deleted, but the phone continues to behave strangely (for example, spontaneously unlocks or, conversely, ignores touches), try clearing the cache of the system application responsible for security. To do this, go to Settings → Applications → All applications. Find the system processes associated with Fingerprint or Keymaster in the list, and select the option Clear Data.

A more radical method is to reset your phone to factory settings, which will remove not only your fingerprints, but all your photos, contacts and apps, and only in extreme cases when other methods have failed, or before selling your device, make sure to back up your data in the Mi Cloud or on your computer before you start.

Settings → About the phone → Reset settings → Erase all data

Once completely reset, the phone will go back out of the box. When you first set up, you will be asked to create a new password and, if you wish, record new fingerprints. The old biometrics will be destroyed without any possibility of recovery.

• 🔄 Sequential removal of all profiles manually through the menu.
• 🧹 Cleaning up system security services data in the application menu.
• 📉 Hard Reset Destroys All Biometrics.

Solution when working with a print on Redmi 9

Xiaomi Redmi 9 users sometimes face a situation where the fingerprint is not removed in the standard way. The menu may not respond, or the delete button may be inactive. Often this is due to a process in the background that blocks the change in security settings, or the sensor itself temporarily does not respond.

One of the common causes of problems is the use of third-party launchers or themes that conflict with the system security interface. Try temporarily switching to the standard MIUI theme and the classic launcher. It is also worth checking whether the Guest mode or the second space is included, as these biometric settings may be limited.

If the sensor is physically contaminated or damaged, the system may not allow the fingerprint to be removed, believing that the reading process is underway.Wash the back of the smartphone with a soft cloth. In rare cases, it helps to update the system to the latest available version through the About Phone menu → MIUI version.

⚠️ Note: If after resetting or removing the fingerprint, the scanner stopped responding to touch at all (even adding a new one), the sensor plume or the module itself may be damaged.

Frequently Asked Questions (FAQ)

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Fingerprint removal is a safe and reversible operation that does not affect the device warranty, but requires knowledge of the primary unlock password.