How to Optimize Xiaomi Redmi Note 9C: 15 proven methods

Xiaomi Redmi Note 9C It remains one of the most popular budget smartphones even years after its release, but over time, many users face slowdowns, fast battery drains and memory shortages. In this article, we will discuss specific optimization methods that will help return the device performance and extend its service life.

It is important to understand: optimization is not a one-time procedure, but a set of measures that includes system setup, garbage cleaning, background process management and hardware tricks. We're going to focus on practical solutions that have real impact, not abstract tips like "remove unnecessary apps." 9C firmware MIUI 12-14 relevant 2026 year-end.

We will pay special attention to two key aspects: software optimization (settings). MIUI, Autoboot, cache) and hardware limitations (MediaTek Helio processor) G35, 2/3 GB of RAM, eMMC. These nuances make Note. 9C unique in terms of optimization – what works on flagships, here can give the opposite effect.

1. Diagnostics of the current state of the smartphone

Before you start optimizing, you need to understand what exactly is slowing down your Redmi Note. 9C. For this purpose, we use built-in tools and third-party utilities.

Go to Settings. → The phone. → System status. This is the mapping:

• 📊 Occupied space (Memory section) – if less than 10% is free, it is critical;
• 🔋 Battery status – if capacity has fallen below 80%, energy optimization is meaningless without replacing battery packs;
• 🖥️ RAM usage – if less than 300MB is free, the system starts to “kill” applications.

For deep diagnostics, install AccuBattery (battery analysis) and DevCheck (hardware monitoring).

• 🔥 Processor temperature under load (norm up to 60)°C, overheating);
• ⚡ Real charging current (for Note) 9C norm 1.2-1.5And 10Watt);
• 📉 Battery degradation (if health is below 70%, software optimization will not help).

⚠️ Note: If you see in DevCheck that the frequency of the Helio processor G35 constantly falls below 1.2 GHz for simple tasks (for example, scrolling through the social network tape), this is a sign of thermal throttling - the system forcibly reduces performance due to overheating. In this case, first solve the problem with cooling (cleaning from dust, replacing thermopaste), and then do the software.

System Cleanup: What Can Be Removed Without Risk

Redmi Note 9C It comes with pre-installed Xiaomi and Google apps, many of which cannot be removed by standard means, but some of which can be disabled or replaced with lighter ones.

List of safe applications to remove / disable:

• 🎵 Mi Music - Replace with Mi Music VLC or musicolet (weighing in) 2-3 less);
• 📺 Mi Video - The Alternative: MX Player (codecs for MediaTek are built in);
• 📰 Mi Browser – Use Bromite (no ads) or Firefox Focus;
• 🎮 Game Turbo is useless on Helio G35, just loading the system;
• 📱 Cleaner - built-in cleaning utility consumes resources, it is better to use SD Maid.

To disable system applications:

1. Go to Settings → Applications → Application Management;
2. Select an unnecessary app (such as Mi Pay)
3. Click Disable (if the button is inactive, delete the updates first)
4. Confirm the action.

Use for deep cleaning ADB-Teams (computer required):

adb shell pm uninstall -k --user 0 com.miui.videoplayer


adb shell pm uninstall -k --user 0 com.android.browser

Attention:

com.qualcomm...

com.mediatek...

3. Optimization MIUI for maximum productivity

MIUI on the Redmi Note 9C It's overloaded with visuals that eat up precious resources:

Step 1: Remove animations

• Go to Settings. → Special facilities → Remove animations;
• Activate the switch Remove the animation of windows;
• For complete shutdown, perform in ADB: adb shell settings put global window_animation_scale 0 adb shell settings put global transition_animation_scale 0 adb shell settings put global animator_duration_scale 0

Step 2: Configure background processes

• B Settings → Battery → Select Balanced Performance Mode (not Performance, it heats the processor!);
• Open the Settings. → Annexes → Autostart and disable autoboot for all social networks and instant messengers;
• B Settings → Permits → Auto-run only leave critical applications (calls, SMS).

💡

If after disabling animations, the interface began to “twitch”, return the value animator_duration_scale on 0.5 instead 0. This will remove delays, but will keep smoothness.

4. Acceleration of eMMC memory

Redmi Note 9C Equipped with eMMC memory (not fast memory) UFS), And it's degraded over time, to extend its life and speed up its work:

Methods of eMMC optimization:

• 📁 Move the applications to SD-card (if supported) Use class cards A2 (For example, SanDisk Extreme);
• 🔄 Turn off automatic app updates in the Play Market → Settings → Auto-update;
• 🗑️ Follow the command regularly TRIM (Cleans up the “junk” memory blocks: adb shell fstrim -v /data
• 📥 Avoid memory over 85% – this is critical for eMMC.

Important for the Redmi Note 9C: Never use an application type "RAM "Booster" or "CPU They force processes to close, which leads to the re-loading of data from slow eMMC memory and only aggravates the lags.

To check the memory speed, use AndroBench. Normal readings for Note 9C:

• Reading: 150-200 MB/s;
• Recording: 50-80 MB/s.

If the values are lower by 30%+ — This is a sign of wear and tear of eMMC, it is time to think about replacing the memory module.

5. Battery Optimization: How to Extend Your Lifetime

Redmi Note battery 9C on 5000 mh should hold the charge 1.5-2 If the battery is used in moderation, the battery is used in 6-8 The problem is not in capacity, but in the background processes.

Steps to save charge:

• 📵 Turn it off. 4G/LTE, If you don't need the internet, Helio G35 It is very hot when working with mobile network;
• 📍 Turn off permanent location determination in Settings → Location → Mode (select only by device);
• 🔄 Limit background activity: adb shell cmd appops set com.facebook.katana RUN_IN_BACKGROUND ignore (replace com.facebook.katana with the desired application package);
• 🌙 Activate the Battery mode in Settings → Battery → Battery modes (not Super Battery, it blocks notifications).

💡

The most effective way to save power on Redmi Note 9C — Turn off autosynchronization for Google and social media. +20-30% time-out.

⚠️ Warning: If the battery is swollen (see above the raised screen) or the phone is turned off when the battery is inflated. 20-30% Do not optimize the software, but urgently change the battery! Continuing to use the bloated battery is dangerous (risk of fire) and leads to damage to the motherboard.

6. Alternative firmware: is it worth switching to caste

Many users of the Redmi Note 9C They're looking at custom firmware like LineageOS or Pixel Experience as a way to optimize:

The advantages of custom firmware:

• ✅ No built-in garbage from Xiaomi;
• ✅ More recent versions of Android;
• ✅ Possibility of fine tuning of the core.

Cons for Redmi Note 9C:

• ❌ No official support - all firmware is unstable;
• ❌ Camera problems - Note modules 9C poorly maintained AOSP;
• ❌ Brick Risk – MediaTek is Harder to Recover After Firmware Error;
• ❌ Widevine's loss L1 — will not HD into Netflix/YouTube.

If you do, follow this algorithm:

1. Unlock the bootloader through Mi Unlock Tool (you need a Xiaomi account tied to the device);
2. Install. TWRP note 9C (version should support MT6765);
3. Download the firmware from the official forum (for example, XDA);
4. Write through fastboot or TWRP, Follow the instructions for your model.

7 Hardware tricks: cooling and physical optimization

Software optimization works, but Redmi Note 9C It's a common problem with overheating because of a weak cooling system, and physical techniques can help lower the temperature and improve productivity:

Cooling methods:

• 🧊 Replacement of thermopaste - the original paste on Helio G35 dry out 1.5-2 Use the Arctic. MX-4;
• 📱 Use of a radiator case (e.g. Baseus Magnetic Cooling);
• 🪛 Cleaning from dust – disassemble the phone and blow the speakers / connectors with compressed air;
• ☀️ Avoid direct sunlight, even if you are not. 5 Minutes in the sun increase the temperature of the processor 10-15°C.

To replace the thermal paste:

1. Remove the back cover (need a mediator and a hair dryer to soften the glue);
2. Disconnect the battery plume;
3. Remove the metal plate from the processor;
4. Remove the old paste with alcohol, apply the new with a thin layer;
5. Get the device together, check the sensor.

💡

If you don't want to take your phone apart, use an external cooler for smartphones (like Black Shark FunCooler Pro). 5-8°C for playloads.

⚠️ Note: When disassembling Redmi Note 9C Be careful with the fingerprint scanner plume, which is very fragile, and if you damage it, the scanner will stop working and it will cost you to replace the plume. 30-40% phone-price.

8.Games on the Redmi Note 9C: How to make the most of Helio G35

MediaTek Helio G35 — weak processor for modern games, but with the right settings, you can achieve acceptable FPS light-project (PUBG Mobile, Free Fire, Call of Duty Mobile).

The best settings for games:

• 🎮 Permission: 720p (HD);
• 🔄 Frequency of frames: 30 FPS (60 FPS lay down);
• 📊 Graphics: Low/Mediocre;
• 🔇 Turn off the sound – audio processing loads the processor;
• ⚡ Activate Game Turbo (although it loads the system, it gives you a game). +5-10 FPS).

For PUBG Mobile use configuration:

Graphics: Smooth


Frame Rate: Medium




Style: Classic




Anti-Aliasing: Off




Auto-Adjust Graphics: Off

If the game is still slowing down:

• Close all background applications through Recent → Close it all down;
• Turn off Wi-Fi and use mobile internet (less ping)
• Reduce the size of the texture in the graphic settings;
• Use it. GFX Tool for forced reduction of permission to 640×360.

💡

On the Redmi Note. 9C Never play games like Genshin Impact or Diablo Immortal – they will not only lag, but can also physically damage the phone due to overheating of the processor to 90.°C+.

FAQ: Frequent questions about Redmi Note optimization 9C