Introduction: When heating is the norm and when is the problem
Xiaomi Redmi Note 4X (codenamed mido) is still one of the brand’s most popular budget smartphones, despite its release in 2017. Its Snapdragon 625 processor, 4000 mAh battery and metal body provide good performance, but often owners face overheating. Is it normal?
Any smartphone gets hot when you're working hard -- that's a physical law, for example, after 30 minutes of playing a game of squash. PUBG Mobile body temperature can rise to 40-45°C, and that's not critical. 4X warm up to 50°C+ In standby mode or simply scrolling through social media feeds, this is a malfunction signal, and in this article we will look at all possible causes, from software failures to hardware breakdowns, and give clear diagnostic instructions.
1.Snapdragon 625 processor: why it overheats
The Redmi Note 4X's CPU, the Qualcomm Snapdragon 625 (8 cores, 2.0 GHz), is built on a 14nm process, which was the optimal balance of performance and energy efficiency for 2017, but is now obsolete.
- 🔥 Trottling: With a long load, the processor automatically lowers the frequency to avoid burning, which leads to jerks in games and even more heat.
- 🧩 Bad thermopaste: over time, it dries up, worsening the heat sink. - Redmi Note 4X thermopaste is applied in a thin layer, and its wear is manifested after 2-3 years.
- 📱 Metal case: conducts heat well, but also heats itself quickly, creating the effect of "hooks".
How do you check the load on the processor? Install an AIDA64 or CPU Monitor application and see the load schedule of the cores. Even if one or more cores are loaded by 30 to 50 percent in a simple core, this is an anomaly.
⚠️ Note: If the processor temperature exceeds 65°C (data from AIDA64), Stop using your smartphone immediately.Risk of damage to the motherboard!
Battery: wear and unusable charging modes
The 4,000 mAh battery in the Redmi Note 4X is one of the weak spots of the model, and after 3-4 years of use, its real capacity drops to 60-70%, and internal resistance increases, which leads to:
- 🔋 Overheating when charging: If the battery is worn out, it heats up to 45-50°C even when using the original sm.
- ⚡ Fast discharge: the smartphone can lose 1% of charge per minute in idle – this is a sign of degradation of elements.
- 🔌 Incompatibility with fast charging: Redmi Note 4X Quick Charge 3.0 supports, but older batteries can’t withstand high currents.
Check the status of the battery through the engineering menu:
- Please dial the phone application ##4636##.
- Select Battery Information.
- Look at Battery Health, and if it's below 80 percent, you should change the battery.
| Battery status | Temperature in plain | Temperature during charging | Recommendations |
|---|---|---|---|
| New (80-100%) | 25–35°C | 35–42°C | Norma, there's nothing to do. |
| Average wear (60–80%) | 35–40°C | 42–48°C | Watch the heating, avoid fast charging |
| Strong wear (<60%) | >40°C | >48°C | Battery replacement is mandatory |
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If the smartphone warms only when charging, try using the ROM on the 5V/1A (standard USB-If the heat goes away, the power supply or cable is a problem.
3. Programmatic causes: viruses, background processes, MIUI
Operating system MIUI (Even in the latest versions of the Redmi Note 4X) It's known for its appetite for resources, and users often set questionable questions. APK-files that load the processor in the background. Common problems:
- 🦠 Mining viruses: secretly using the processor to mine cryptocurrency. → Battery – if an unknown application consumes >10% charge, that's suspicious.
- 📱 Auto-updates MIUI: The system can download updates in the background, loading the network and CPU.
- 🎮 Optimizers and boosters: paradox, but applications like Clean Master or DU Speed Booster consumes resources themselves, creating a stub effect".
How to clean the system:
- Go to Settings → Applications → Application Management.
- Sort by CPU usage.
- Remove or disable suspicious programs.
- Turn on Developer Mode (click 7 times on the MIUI version in Settings → About Phone) and turn off Windows Animation and Transitions.
☑️ Cleanup checklist MIUI
4 Games and Heavy Apps: How to Reduce the Load
Redmi Note 4X with Snapdragon 625 and 3/4 GB of RAM is not designed for modern games like Genshin Impact or Call of Duty Mobile. However, even in Brawl Stars or Free Fire, it can warm up to 50 ° C +.
- 🎮 High graphics settings: games often have Ultra or High defaults, although the Adreno 506 (video accelerator) can’t handle them.
- 🔄 No restriction FPS: Many games are not optimized for the Redmi Note 60Hz screen 4X, why GPU slack.
- 📱 Screen overheating: AMOLED-The matrices (in some versions) are warmer IPS, particularly at high brightness.
How to reduce the heat in games:
- In the game settings, select Low Graphics and limit FPS to 30 fps.
- Use Game Turbo (built into MIUI) or GFX Tools to force resolution downgrades.
- Turn off background processes through Settings → Special features → Barrier-free mode.
⚠️ Warning: If the smartphone turns off when playing with temperature >60°C, it's thermal protection. Don't turn it on right away -- let it cool for 10 to 15 minutes!
What if the game is even in low settings?
5 Network problems: Wi-Fi, mobile internet and GPS
The communications modules (Wi-Fi, 4G, GPS) in the Redmi Note 4X, when used actively, can heat the upper body, especially in the following cases:
- 📶 Weak signal of the cellular network: the phone is constantly looking for cells, loading the Qualcomm module X9 LTE.
- 🌐 Unstable Wi-Fi: If the router is far away or running at 5GHz, the adapter overheats.
- 📍 Continuous use GPS: applications like Google Maps or Yandex.Navigator makes the module work GPS/GLONASS full-on.
How to reduce the heat from communication modules:
- Turn off Network Auto Search in Settings → SIM-maps and mobile networks.
- Switch to 3G if the 4G signal is weak (in Settings → Mobile Network → Network Type).
- Use Wi-Fi Analyzer to find the router’s least loaded channel.
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If your phone only warms when using mobile internet, try inserting it. SIM-card to another slot (if there are two of them), sometimes one of the modules does not work correctly.
6. Hardware malfunctions: what breaks most often
If all software methods have been tried and the Redmi Note 4X is still warming up, the problem could be the hardware.
- 🔌 Faulty Charging Controller: If the phone only warms when connected to RAM, the chip is to blame BQ25890 (plug-in USB).
- 📱 Oxidation of battery contacts: over time, a green coating appears on the terminals, worsening contact.
- 🔥 Short circuit in the motherboard: often occurs after falls or moisture is detected by sharp heating even when turned off.
Self-diagnosis:
- Check if the phone is warming in Safe Mode (press the power button → hold "Switch off power" → "Reboot in Safe Mode"). If the heat is lost, it is the fault of the software.
- Light a flashlight on the motherboard (removing the back cover beforehand) and blackened or bloated capacitors are a sign of malfunction.
- Check the current consumption in the simple with the help USB-Normal: 50 to 150 mA. If >300mA - there's a leak.
⚠️ Warning: If the phone is warming even when it's off, immediately remove the battery (if it's removable) or take it to the service!
7.How to prevent overheating: preventive measures
To make the Redmi Note 4X last longer without overheating, follow these recommendations:
- 🔋 Charging: Use only the original RAM 5V/2A Do not charge your phone in the sun or near heat sources.
- 🎮 Games: Limit sessions to 30 to 40 minutes, take breaks. Avoid silicone or leather covers - they worsen heat sink.
- 📱 Updates: Update regularly MIUI (Path: Settings → The phone. → Update system: new versions optimize energy consumption.
- 🧹 Clean: Clean the dust charger once every 3 months (use a wooden toothpick, not metal objects!).
For advanced users:
- Install a custom core (such as FrancoKernel) for better processor frequency management.
- Calibrate the battery through the engineering menu (#36446337# → Battery → Battery Calibration).
- Replace the thermopaste with the Arctic MX-4 or Kryonaut (requires disassembly of the phone).
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The optimum temperature for battery life is 10–35°C. Avoid using your smartphone at <0°C or >40°C!