Modern smartphones like the Xiaomi Poco M3 offer many ways to protect personal data, but biometrics remains the most convenient of them: turning on the fingerprint scanner not only speeds up the unlocking of the screen, but also allows you to confirm payments and log in to applications with a single touch. Many users after buying face the need to first configure this module to protect your gadget from unauthorized access.
The process of activating biometric protection in the MIUI shell is thought out as intuitively as possible, but there are nuances that should be considered for the correct operation of the sensor. The side-facing button-scanner responds to the slightest changes in pressure, but requires correct calibration at the first start. In this article, we will discuss all the steps to set up, as well as discuss the issues of increasing sensitivity and solving typical errors that may occur in Poco M3 owners.
Before you get into the technical details, it is important to understand that the quality of the reading depends on the condition of the finger surface and the purity of the sensor itself. Fat spots, moisture or protective film covering the scanner can significantly reduce the response rate of the system.
Location and preparation of the fingerprint scanner
In the Poco M3, Xiaomi engineers integrated the fingerprint module directly into the power button on the right end of the body, which allows you to unlock the smartphone with a natural thumb movement without changing the grip of the device, which is especially convenient for people with large palms who have difficulty reaching the center of the screen, and saves battery power compared to the constant use of the display.
Before you start registering fingerprints, you need to make sure that the smartphone software is updated to the latest available version. Older versions of firmware may contain bugs that affect the operation of sensor drivers. You can check for updates by going to the Settings → About phone and clicking on the system version. If new data packages are available, they should be installed before setting up the biometrics.
Also worth paying attention to is the case you plan to use. Some security accessories have protruding sides that can block access to the button or interfere with the tight fit of the finger. If you wear a tight shockproof case, make sure that the scanner area is open and nothing prevents the skin from contacting the sensor directly.
⚠️ Note: Do not try to unlock items with similar relief, as the security system MIUI This may be perceived as an attempt to hack and temporarily block the password entry function.
It's also important to consider that the scanner is based on a technology that reads the electrical charge of the body, which means that with gloves or wet hands, the method may not work, which is why the system always requires a backup method of entry — PIN-a code or pattern lock that will be requested after the device is restarted.
Step-by-step instructions for activation of biometrics
The process of adding a fingerprint takes only a couple of minutes and requires no special skills. First, you need to log into the main settings menu of your Poco M3. Find the section responsible for passwords and security, and select the option to add new data. The system will prompt you to choose the finger that you will use most often to unlock.
Once you select your finger, you'll have animations, instructing you to put your finger on the side button many times, and you don't have to do it quickly; you'll want to put your finger on different angles and different pressing forces, so that the sensor can remember all the features of your skin, and you can split it into several steps if you're tired or sweaty.
☑️ Setup checklist
When the fill scale reaches 100%, the system will prompt you to name the fingerprint, for example, "Left big" or "Right index." This is especially useful if you decide to add fingerprints of several fingers or even members of your family (although the latter is not recommended for security purposes).
- 👉 Open Settings and go to Passwords and Security.
- 👉 Select Unlock by fingerprint and enter your current password.
- 👉 Click Add a fingerprint and follow the instructions on the screen by putting your finger on the button.
- 👉 After successful completion, assign a name to the fingerprint and confirm the action.
Configure additional parameters and functions
Once the main print is added, the scanner settings menu becomes more extensive. In the Xiaomi Poco M3, you can activate the screen unlock function without having to press the confirmation button further, which means that the phone unlocks as soon as the sensor recognizes your finger, which saves you time in everyday use.
Another useful option is the ability to use a fingerprint to log in to apps and payment systems, allowing biometrics for Google Pay (or its analogues), Alipay and other banking applications, eliminating the need to enter a long password every time you make in-store purchases or transfer funds.
Hidden capabilities of the scanner
The fingerprint management section also includes the old data deletion feature, which means that if you hurt your finger or just want to delete your saved profile, you can do so at any time, and the system stores the data locally in the Trusted Execution Environment (TEE) memory partition, and it is never transferred to the company's servers or to third parties.
| Parameter | Description of function | Recommendation |
|---|---|---|
| Screen unlocking | Automatic entry when touched | Insert for speed |
| Payment and annexes | Authorization in services | Insert for convenience |
| Add a print. | Recording a new finger | Add 2-3 fingers |
| Delete everything | All data dumping | When selling a phone |
Improved accuracy of print reading
Sometimes, the smartphone stops recognizing the finger the first time or requires re-applying, which can be due to changes in skin conditions, such as in the winter, the hands dry and sweat in the summer. To improve the situation in the fingerprint settings menu, there is an option "Improving the fingerprint", which allows you to re-write the missing areas of relief.
To use this feature, you have to log back into the fingerprint management menu, select the finger you have saved, and press the button, and the system will ask you to put your finger again, but with an emphasis on the areas that are read less, which is especially true if you often use the same part of your finger, ignoring the edges.
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If your finger sweats frequently, try registering it twice under different names (e.g., "Finger 1" and "Finger 1 dry") will increase your chance of successfully unlocking.
The pressure is also very sensitive in the Poco M3, but too little of a touch can not activate the sensor, too much can distort the skin pattern, and find the optimal force, which is the medium between a light touch and a confident push, and train with that force.
- 💧 Use the function "Improving the fingerprint" when changing the condition of the skin.
- 💧 Regularly wipe the switch on with an alcohol napkin to remove fat.
- 💧 Avoid registering a fingerprint immediately after applying hand cream.
Solving common problems and errors
Despite the reliability of the technology, users may encounter situations where the scanner stops responding or gives an error. Often the problem lies in a software failure that can be fixed by simply restarting the device. If after turning on the smartphone the function still does not work, it is worth checking whether the "Gloves" mode or other specific screen settings are turned on.
In some cases, the problem may be caused by third-party applications that conflict with system security services. Try to run your smartphone in safe mode and check the scanner. If the fingerprint is read correctly in safe mode, then some of the applications you install interfere with the module.
⚠️ Note: If the scanner stopped working after the fall of the phone or getting moisture inside the case, self-disassembly can lead to the final failure of the module – contact the service.
If the software doesn't work, you can try resetting the sensor, delete all the fingerprints you saved and recreate them by following the initial setup instructions, and in extreme cases, even if it doesn't work, it can be a physical failure of the plume or the sensor itself.
Data security and storage issues
Many users worry about where their biometric data is stored. Xiaomi smartphones, including the Poco M3 model, use isolated storage, which means that the fingerprint image is not stored as a normal photo, but is converted into digital code that is stored in a secure area of the processor.
Even if your phone is infected by a virus or hacked, it is almost impossible to access that storage without physical access to the chip and sophisticated hardware, and the data is not synchronized with the Mi Cloud or Google account, remaining solely on the device.
However, it is worth remembering that biometrics is not absolute protection: a fingerprint cannot be changed like a password, so for critical data (for example, banking applications with large amounts), it is recommended to use two-factor authentication or additional authentication. PIN-code.
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Biometric data in Poco M3 is stored in encrypted form locally and is not transferred to servers, which guarantees a high level of privacy.