Xiaomi Redmi smartphones have long been popular due to the ratio of price and functionality, but even they are not immune to technical problems. Users often face sudden reboots, slow operation, overheating or rapid battery discharge. 80% of these problems are not due to factory defects, but to software failures, improper settings or wear of components.
In this article, we’ll look at 12 of the most common reasons why your Redmi might not work properly, and give you step-by-step instructions for fixing them, from simple steps like cleaning a cache to complex firmware manipulations, and learn how to tell a hardware glitch from a software glitch when you need to go to a service center, and when you can solve a problem yourself in 10 minutes.
We will focus on hidden MIUI settings that the manufacturer does not advertise, but which can dramatically improve the performance of the device, such as turning off background optimization for specific applications or forcibly limiting the frequency of the processor when overheating.
1. Sudden reboots: hardware failure or virus?
If your Redmi Note 10 or Redmi 9A spontaneously restarts, check the error log first.
- Go to Settings → About Phone → MIUI version (shap 7 times to activate developer mode).
- Go back to the basic settings and open Additional → For developers → Error Log.
- Look for records with a reboot or crash label.
Frequent causes:
- 🔋 Faulty battery (swelling, wear and tear) >80%. Check the settings → Battery → Battery status.
- 📱 Damaged firmware after a failed update, typical of Redmi models 8/8A prior MIUI 14.
- 🦠 Malware masquerading as system processes (e.g. com.android.qualcomm).
⚠️ Warning: If the thermal engine is mentioned in the error log, it is a sign of critical overheating!
More often. 1 day-to-day|1-2 weekly|Only when charging.|Never.-->
2.Slow operation: why Redmi is "braking" after a year of use
The slowdown is the most common complaint of Redmi owners of the Note and Prime series.
- Filled memory: MIUI starts to "glutch" when filling up the storage at 90%+. Check in Settings → Storage.
- Background Processes: By default, MIUI leaves up to 30 applications in memory. Disable autorun for unnecessary programs in Settings → Applications → Autorun.
- Processor Trottling: When heated above 65°C, the Snapdragon 6xx/7xx frequency automatically decreases by 30-40%.
How to speed up your smartphone without resetting:
Clear cache in Settings → Warehouse → Clear cache | Disable animation in For Developers → Animation Scale (select 0.5x) | Set easy theme | Disable Smart Help in Security Settings-->
| Model Redmi | Typical cause of brakes | Decision |
|---|---|---|
| Redmi 9/9C | Weak processor Helio G35/G80 + 2 GB of RAM | Disable background synchronization for social networks |
| Redmi Note 11 Pro | Overheating due to thin body (6.8 mm) | Use a heat sink case |
| Redmi K50 | MIUI 14 conflict with custom cores | Reverse MIUI 13.5 via Fastboot |
3. Rapid battery discharge: Is the firmware or battery to blame?
If your Redmi is discharged in 4-5 hours with moderate use, the problem lies in one of three components:
- 🔋 Battery: After 500 Charging cycles, the capacity falls on 20-30%. Check in the AccuBattery app.
- 📱 Firmware: in MIUI 13-14 There is a bug with background consumption miui.analytics (up to the 15% day-time).
- 📡 Communication module: at weak signal 4G/5G phone-spending 3 More energy than the search for the network.
How to diagnose:
- Run ##4636## → "Battery Information." If health is below 80%, you need a new battery.
- Check the consumption statistics in Settings → Battery → Battery Use. The screen rate is 30-40%, for the system - up to 15%.
💡
If your phone is running at 20%+ at night, turn off “Device Search” and “Sleep Wi-Fi” in Google’s settings.
4.Network problems: why Redmi doesn't catch 4G/5G or often cuts off communications
A weak signal or persistent communication breakdown on Redmi is usually associated with:
- 📶 Wrong settings. APN. For MTS/Beeline/MegaFon should be the following parameters: MTS APN: Internet.mts.ru Proxy: not installed Port: not installed Username: mts Password: mts
- 📱 Damaged. IMEI Check in *#06# - if it shows null, you need to restore.
- 🛡️ Blocking by the operator due to suspicions of fraud (typical for hands-on phones).
How to reset your network settings:
- Go to Settings. → SIM-maps and mobile networks → Resetting network settings.
- Enter. PIN-code (if requested).
- Restart the device and wait for the automatic APN setup (can take up to 5 minutes).
⚠️ Note: On Redmi Note models 10 5G redmi K40 after the network is reset, it may disappear 5G. To return it, manually select network mode. 5G/4G/3G/2G customized SIM-map.
5.Overheating: When it's normal and when it's cause for concern
Redmi processors (especially on the Snapdragon 7xx/8xx) warm up to 45-50°C under intense loads — this is normal. But if the temperature exceeds 60°C in idle or the phone turns off from overheating, look for the reason:
| Symptoms. | Probable cause | Decision |
|---|---|---|
| Charging heating >55°C | Unoriginal power supply (especially on the Redmi Note 11 Pro+ with 120W charging) | Use only the original RAM or certified analogue |
| Overheating in games in 10 minutes | Dried thermopaste (typical for phones older than 2 years) | Replacement of heat paste in the service (cost) ~1500₽) |
| Heating of the upper body | Failure of the 5G camera module or antenna | Diagnostics at the service center |
How to reduce the temperature yourself:
Turn off 5G if not in use | Set FPS limits in games (60 instead of 90/120) | Use Balanced Performance Mode | Remove the case under heavy load-->
What happens if you ignore the heat?
6 Screen problems: artifacts, flickering, dead pixels
Display defects on Redmi are divided into two categories:
- 📺 Software: Flickering at low brightness (bug) MIUI 12-14, Treated by turning off Autobrightness) "Rifle" when scrolling (turn on Settings) → Screen. → Smooth scrolling)
- 🛠️ Hardware: Yellow spots on OLED (Redmi K30 Pro, Redmi 10 Pro) — detachment of LEDs Vertical stripes — damage to the plume (typically after falls) "Dead" pixels — factory defect (guarantee case)
How to test the screen:
- Install Screen Test from the Play Market.
- Test for: Color artifacts (red/green/blue screen) Touch (multi-touch test) Brightness (gradient test)
DISP-0x03
7. Camera errors: blurry, "soap," autofocus not working
Redmi cameras (especially in the Redmi 9/10 budget models) often suffer from software glitches.
- 📸 "Soap in the photo - digital stabilization enabled. Turn off in camera settings Video enhancement → Stabilization.
- 🔍 Autofocus does not work - the laser sensor is contaminated (on models with a laser) LASER AF) or damaged gyroscope.
- 🎥 Green hue in the video - a bug of the Helio processor G90T (It is found on the Redmi Note 8 Pro. MIUI 13.0.4+.
How to reset your camera settings:
- Open the Camera app.
- Put it on the gear (settings) → Restore the default settings.
- Reboot the phone.
- If the problem persists, clear the camera cache in Settings → Apps → Camera → Storage → Clear the cache.
💡
On the Redmi Note 11S and Redmi 10 2022, blurring of the front camera is often associated with the protective film on the lens. Carefully remove it with a needle (don't use a knife!).