When your favorite gadget starts to behave strangely — the screen goes out, the sound does not work, or the device turns into a “brick”, the user experiences a natural panic. The phrase “what’s with the phone” becomes the most common search query, but there is no universal answer, since symptoms can indicate dozens of different reasons. In the world of Android, and in particular in the shell of MIUI or HyperOS, failures are often of a software nature, but you can not rule out hardware breakdowns either.
Before you take your device to a service center, it’s important to do basic diagnostics to understand the scale of the disaster. Xiaomi equips its devices with powerful self-diagnostic tools that many don’t even know about. In this article, we’ll look at the main crash scenarios, how to fix them, and when a specialist’s intervention becomes inevitable.
Don't ignore the first signs of a system that's not working properly, if you notice that the interface is slowing down or that the apps are shutting down on their own, that's a signal to action. A timely response will help save data and extend the life of your smartphone. Let's look at the basics of troubleshooting.
Software failures and system freezes
The most common reason users wonder what happened to their gadget is because of the software. MIUI is a complex add-on over Android that can sometimes conflict with installed apps or system processes. If the Xiaomi phone is getting stuck and doesn't respond to touch, the first thing to try is to perform a forced reboot.
To do this, press the power button and the volume button at the same time and hold them for about 10-15 seconds. The screen should go out, then the brand logo will appear. If the device responds to the command, then the hardware is most likely intact. However, if the problem recurs regularly, it is worth checking for updates or uninstalling recently installed programs.
Often, the cause of "glitch" is a crowded cache or a lack of RAM, the system begins to work slower, and background processes can block basic functions, in such cases, cleaning through the built-in "Security" application or resetting the settings to factory, but the latter method requires prior backup of data.
It is worth noting that some "hangs" are actually the work of the "Application Freeze" function, which is designed to save battery, but can aggressively unload the desired programs from memory. → Permits → Auto-start.
Problems with charging and battery
When the phone stops charging or shows the wrong percentage of battery, it is very common. If the cable does not light up, the first thing to do is check the charging port itself. It often gets dust and pile from your pockets, which interferes with contact. Carefully clean the connector with a wooden toothpick or soft brush.
The second important aspect is the condition of the cable and the power supply. Cheap accessories may not produce the necessary current, which will charge the Xiaomi phone for a very long time or even refuse to take power. Use original cables or certified analogues with support for fast charging Quick Charge or Power Delivery.
If the phone is charging but discharged "in front of the eyes" even in standby mode, the battery may have worn out. Lithium polymer batteries have a limited resource of recharge cycles. You can check the battery status through an engineering menu or special applications, but the only accurate result will be a replacement of the battery in the service.
⚠️ Warning: If Xiaomi phone gets too hot while charging, disconnect it immediately from the grid.Continued use could cause battery bloating or fire.
Also worth mentioning is a software bug where the charge indicator gets stuck at a certain value (e.g. 80%) and doesn’t go any further even when the phone is connected. In this case, calibration helps: discharge the device before turning it off, then charge to 100% when it’s off.
Screen epic: touchscreen and matrix
Display problems are one of the most painful topics for smartphone owners: If the screen goes out on its own, but the phone continues to work (sound is coming, notifications are coming), the proximity sensor or display plume is likely to fail, often after falls or moisture.
A more complicated case is the appearance of stripes, spots or "broken" pixels on the matrix. This is a physical damage to the inside of the screen that cannot be repaired, requires a complete replacement of the module. However, if the touchscreen has begun to "live its life" (phantom presses), try to remove the protective glass or film. Sometimes poor protection creates a static voltage that interferes with the sensor.
💡
To check the touchscreen, use the engineering code ##6484##. In the CIT menu, select Touchpanel and swipe all the squares – they should be colored green without skips.
If the screen is black, but the phone vibrates when it rings, the plume may have gone away.In some Xiaomi models (for example, the Redmi Note series), this is treated with a slight pressure on the top of the screen or soldering of the connector, but it is better not to take risks and turn to the wizard.
A separate issue to mention is brightness. If the automatic adjustment stops working, check the light sensor. It's often covered with a protective glass that may have become contaminated or unstuck. Wipe the top of the screen with a soft cloth.
Network, Wi-Fi and Communication Problems
When a phone loses its network or Wi-Fi, the user is left cut off from the world. If the cellular signal is missing, check the first thing. SIM-Remove the tray, wipe the contacts of the card with alcohol and insert back. Make sure you use the correct size. SIM (nano-SIM) and the tray is not skewed.
Wi-Fi issues on Xiaomi are often related to power saving settings or frequency conflicts. Try forgetting the network and connecting again. It's also worth checking if flight mode is on and if the "Wi-Fi Assistant" feature is activated, which can switch the connection to mobile Internet when a signal is weak.
In rare cases, the problem is with the antenna module, if after the fall, the phone stopped catching the network at all (writes "No" to the phone). SIM-"Calls Only" or "Emergency Calls" cards are likely to have damaged the antenna plume or radio module on the board.
☑️ Network diagnostics
For deep diagnostics, you can use the secret code ##4636##. From the menu that opens, select Phone Information and check the network status, and you can force the network mode to switch (for example, only LTE) if the automatic selection does not work correctly.
Camera and multimedia
If the camera app crashes or shows a black screen, the problem can be in both the software and hardware. Try clearing the Camera app cache through the app settings. If that doesn't work, check if the camera is busy with another process (e.g., a video call in the messenger).
The quality of the photos can deteriorate due to contaminated optics. Wipe the camera lenses with soft cloth. If the photo shows black spots that do not disappear after cleaning, then the dust has entered the camera module, and you need to disassemble the device.
Sound problems (speakers wheezing, no one else is listening) are often solved by cleaning the speaker grid. Use a soft toothbrush. If the sound is gone completely, check the equalizer settings and if the vibration only mode is on.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| Black screen on the call | The proximity sensor is defective. | Sensor calibration or plume replacement |
| Phone's warming up. | Background processes / Battery wear | Application Audit / Replacement of AKB |
| Wi-Fi's not working. | Driver failure/antenna | Resetting network settings / Soldering antenna |
| Camera's coming out. | PO conflict/Schleif | Reset to factory / Module replacement |
When professional repairs are needed
There are a number of situations where doing it yourself can only hurt. If the phone falls into the water, do not try to charge it. Even if it turns on, the contacts could already start oxidizing inside, in which case the device should be turned off and delivered to the service as soon as possible for ultrasonic cleaning.
Cracks on the back cover or frame are not only a cosmetic defect; leakage of the case leads to dust and moisture entering the body, and also worsens the heat sink; it is better to trust the replacement of the glass or body to specialists, since it is easy to damage the plumes or battery when disassembling yourself.
The rice myth
If you see artifacts on the screen, the smell of burning or the bloating of the battery, the operation of the device is dangerous, in such cases, the question of "what is with the phone" should be decided exclusively in an authorized service center Xiaomi.
⚠️ Warning: Opening the case itself deprives you of warranty. If the device is warranty, any manipulation beyond simple reboot may be considered a violation of the terms.