Buying wearable electronics from a popular brand always carries the risk of running into low-quality goods or outright fakes. The gadget market is full of copies that are almost indistinguishable from the original, but have cheap components inside. That is why the question of how to check the fitness bracelet Xiaomi remains relevant for thousands of users planning to buy from hand or in questionable stores.
Modern activity trackers are complex devices with multiple sensors that require careful inspection. Visual inspection is not enough, because many defects are only manifested during operation or software diagnostics. You will have to evaluate not only the appearance of the case, but also the performance of the sensors, the quality of the connection to the smartphone and the actual capacity of the battery. Ignoring these steps can lead to the purchase of a device that will stop working in a week.
In this article, we’ll take a look at all the steps of testing a gadget, from initial inspection to deep software analysis. You’ll learn what hidden features Mi Band trackers have and how to spot a marriage that an inexperienced user won’t notice. A comprehensive approach ensures you get exactly what you paid for.
External inspection and configuration check
The first thing that any diagnostic begins with is a careful examination of the appearance of the device. Xiaomi's original products are characterized by high build quality, no backlashes and gaps between the module and the strap. Carefully examine the screen when the device is turned off: there should be no scratches, spots or glue marks on the matt coating. Any printing defects on the back of the capsule can also indicate poor replica quality.
Pay special attention to the marking. The back of the tracker should clearly show the model, serial number and specifications. The engraving should be flat, deep and not erased by light mechanical action. Counterfeiting often uses cheap paint that starts to climb after the first contact with sweat or water. Also check the contacts for charging: they must be clean, free of oxides and damage.
⚠️ Note: If the back of the device does not have a Mi logo or technical inscriptions are made with grammatical errors, you are most likely to have a counterfeit copy.
The package also plays an important role in authentication: the original box always contains a multilingual instruction, warranty card and charger (or cable, depending on the model), the package must be made of dense cardboard with quality printing, barcodes on the box and on the device must match, which is an important marker of the legality of the product.
Model identification and pairing with a smartphone
The next critical step is to check compatibility and the process of connecting to the mobile device. To work with trackers Xiaomi uses the official application Mi Fitness (formerly Mi Fit) or Zepp Life. Attempting to connect the device through third-party, informal applications often fails, as the original firmware has protection from unauthorized access. Download the application from the official Google Play store or App Store.
When you turn on the bracelet on the screen should appear a suggestion to choose the language and scan. QR-The process of finding a device in an application usually takes a few seconds. If the phone does not see the bracelet, although it is on and nearby, it is an alarm. The Bluetooth module in the original devices is stable and responds quickly to pairing requests. During the connection process, the application will request permission to access notifications and geolocation – this is a standard procedure for full-fledged operation.
Once paired successfully, the app will automatically prompt a firmware update. This is a great way to test the device: the original bracelets have no problem accepting air-to-air updates (OTAs). If the update process is interrupted or the app reports a version error, there may be a cheap clone inside with modified firmware. Make sure the app displays the device model and its serial number correctly.
What to do if the bracelet is not connected?
Diagnostics of display and touch control
The screen is one of the most expensive and vulnerable components of a fitness bracelet. To check the matrix, you need to display a white image on the entire screen. Carefully examine the surface: there should be no lights on the edges, broken pixels (black or colored dots) or uneven backlights. In models with AMOLED displays, black should be deep and rich, almost merging with the frame of the body.
Touch control in Xiaomi trackers is usually very responsive. Swipe your finger across the screen in different directions, switching menus and widgets. There should be no "dead zones" where touches are not recorded, or reaction delays. Check the automatic brightness, if the model provides this function. Go to a bright light or point a flashlight at the screen: the light sensor should automatically increase the brightness of the glow.
| Verification parameter | Normal condition | Signs of defect |
|---|---|---|
| Color rendering | Bright, saturated colors without distortion | Dull colors, yellow or blue shade of white |
| Sensor | Instant response to touch | Delays, the need to press again |
| Viewing angles | Image can be seen from any angle | Color inversion or dimming when tilted |
| Automation. | Smooth brightness change | Abrupt jumps or lack of reaction to light |
Separately, check the wrist lift function. Set the sensitivity in the app and raise your hand sharply. The screen should light up almost instantly. If the screen lights up with a noticeable delay or does not light up at all, the problem may be in the proximity sensor or gyroscope. In some models, this feature can be reconfigured or calibrated through the engineering menu available in third-party utilities.
Testing of biometric sensors
The main function of a fitness tracker is to monitor health, so the accuracy of the sensors is a priority. Start by checking the optical pulse sensor on the back. During the measurement, the sensor should glow green. Press the device tightly against the wrist: the readings should stabilize within 10-15 seconds. For comparison, measure the pulse by hand or with another tested device. There is a slight error of 3-5 beats, but significant discrepancies indicate a marriage.
The light sensor and the accelerometer also require attention. The accelerometer is responsible for counting steps. Walk a known distance (e.g., 100 meters) and check the bracelet data against reality. If the device counts steps when the arm moves without walking or, conversely, ignores steps, the calibration is shot down. The gyroscope is also responsible for determining the phases of sleep: try to lie still with the tracker on, it should record the beginning of sleep.
⚠️ Warning: When testing the pulse sensor, do not wear the bracelet too tight to not disturb blood circulation, but also do not allow gaps through which light penetrates, distorting the readings.
The new models also have a blood oxygen sensor (SpO2), which works similarly to a pulse sensor, but uses red light. The check is done at rest. If the bracelet gives a measurement error or shows absurd values (for example, 50% or 100% constantly), the sensor is defective. Remember, the medical indications of such gadgets are reference, but the stability of the work must be high.
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For a more accurate check pedometer can use a special app-calibrator on the smartphone, which synchronizes data and shows a schedule of activity in real time.
Testing of autonomy and charging system
Battery life is one of the main parameters that counterfeit users complain about. The original Xiaomi Mi Band is capable of running from 7 to 14 days depending on the model and settings. To check the actual wear of the battery, completely discharge the device before turning off. Then put it on charge and time to 100%. A quick set of capacity (for example, 15-20 minutes) often indicates a small real battery capacity disguised software.
Pay attention to the heating during charging. Light heat is considered normal, but if the body gets hot, it is a sign of problems with the power controller or the battery itself. Also check the contacts: they should not spark or move away. In models with a removable module, make sure that the capsule sits tightly in the strap and does not fall out when active movements.
☑️ Battery and charging checks
The app provides energy consumption statistics. The sudden jumps in the discharge schedule without active load indicate a malfunction. The critical sign is to turn off the device when the charge is above 15-20%, which indicates the degradation of the battery cells. If the bracelet holds a charge for less than 3-4 days in standard use, the battery requires replacement or the device is a poor copy.
Functional tests and additional capabilities
Modern wristbands come with a lot of additional features that need to be tested too. Check the vibratory motor: it should be palpable, but not rattling. Set up different types of vibrations for notifications and alarms. If the vibration is barely noticeable or makes a strange sound, the mechanism can be damaged. Notifications from applications (WhatsApp, Telegram, calls) should come without delay and display the Cyrillic alphabet correctly.
If the model supports music control or has a built-in microphone (for conversations), be sure to test these features. Connect your Bluetooth headphones via a bracelet (if you have one), or check for track switching. Waterproofing is another important aspect. Although many models are marked 5ATM, it is not worth checking the tightness on the new device under high water pressure immediately after purchase. Make sure that the dynamic holes (if any) are clean.
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A comprehensive check of all features, including vibration, notifications and water protection, takes about 30-40 minutes, but saves from buying a defective gadget.
It's also important to check the timing of the time and date. After disconnecting from the phone and losing communication, the bracelet must keep the correct time thanks to the internal timer. If the time is constantly reset after rebooting or losing communication with the phone, then the internal memory battery is dead or there is a software failure. This is a common problem with refurbished devices that have been repaired.