How to speed up Xiaomi Redmi 9C: a complete guide to optimization

Owners of Xiaomi Redmi 9C often face the problem of slowing down the device after 1-2 years of active use. Even a budget smartphone based on the Helio G35 processor and 2/3 GB of RAM can demonstrate acceptable performance if you set it up correctly. In this article, we will discuss 10 proven methods that will help you return to your previous speed without buying a new phone or risky manipulations like overclocking the processor.

The Redmi 9C brakes are usually caused by three key factors: background workload, memory fragmentation, and outdated software. Fortunately, most problems are solved by software methods, from basic cache cleaning to fine-tuning MIUI. It is important to understand that even resetting to factory settings does not always have a long-term effect unless the root cause of the slowdown is addressed.

We tested all of the methods described below on the Redmi 9C with MIUI 12.5 and MIUI 13 firmware (Android 10/11), and the results were recorded using the benchmarks AnTuTu and Geekbench 5, as well as a subjective assessment of the smoothness of the interface, the average performance gain after comprehensive optimization was 25-40% depending on the initial state of the device.

1. Diagnostics of the current state of the smartphone

Before you start optimizing, you need to understand what is stopping your Redmi 9C. 80% of the time, users try to “cure” the consequences without eliminating the cause.

• 📊 CPU boot: Open Settings → The phone. → System status: If the processor is loaded more than 50% in standby mode, there are voracious processes in the system.
• 🗑️ Free Memory: In the Settings section → Memory check how much space is left on the internal drive, and a critical value is less than 10% of the total volume.
• 🔋 Battery consumption: Go to Settings → Battery. → Battery use: applications that consume >5% of the charge in the background is most likely to load the system.
• 📱 Temperature: Use the app CPU Monitor (available on Google Play) If the processor temperature is above 45°C in simple – dust cleaning or replacement of thermopaste is required.

Pay special attention to Settings → Applications → Application Management → Running. This shows all active processes, including system ones. Normal number of applications running for Redmi 9C is 20-30. If there are more than 50, this is a clear sign of overload.

⚠️ Note: If you see unknown applications with names like com.android.XXX or system.update that consume the running processes >100MB of RAM could be a sign of viral activity. Check the device with Malwarebytes or Dr.Web Light.

2. Cleaning up cache and junk files

The easiest and most effective way to get back up is to remove the accumulated cache. MIUI has built-in tools for this, but they often don't clean everything. We recommend combining system tools with third-party utilities.

Method 1: Integrated cleaning of MIUI

1. Go to Settings → Memory → Cleanup.
2. Press Deep Clean and wait for the analysis to be completed.
3. Delete all found files, including app cache, residual files, and duplicates.
4. Return to Memory and select Clear Cache for each app manually (especially for Facebook, Instagram, and instant messengers).

Method 2: Third-party utilities

For more thorough cleaning, use:

• 🧹 SD Maid (cleans system debris, including remnants of remote applications).
• 🗑️ Files by Google (finds and deletes duplicate photos, large files).
• 🔍 CCleaner (optimizes autoboot and Dalvik cache).

Remove the cache of system applications|Clean the Downloads folder|Check the folder. DCIM duplicate|Remove unused items APK-file|Optimize autoloading-->

Once cleaned, restart the device. This is necessary for the system to reassemble the Dalvik cache, which can give an additional 5-10% performance.

3. Optimization of autoboot and background processes

One of the main reasons for the Redmi 9C brakes is excessive background processes that start automatically when you turn on your phone. Even if you don't use the app, it can consume up to 20% of CPU time and 100-300 MB of RAM.

How to turn off autoboot:

1. Go to Settings → Applications → Application Management.
2. Select an app (like Facebook or TikTok).
3. Press Autostart and turn off this option.
4. Repeat for all unnecessary applications.

Restriction of background activity:

• 🚫 For Social Media: Open the App Settings → Battery → Select Limited.
• 📵 For instant messengers: In the settings, specify Optimized mode (for example, for WhatsApp or Telegram).
• ⚡ For gaming clients: Turn off background activity completely (e.g. for Google Play Games).

💡

After disabling autoboot for instant messengers (for example, Viber or Telegram), notifications may come with a delay. To avoid this, add the application to the list of Battery Optimization Exceptions in the MIUI settings.

4. Update of firmware and system core

Outdated firmware is one of the main reasons for the performance decline. Xiaomi regularly releases updates that optimize the performance of the Helio G35 processor and fix errors in memory management.

1. Go to Settings → About the phone → System update.
2. Click Check for updates.
3. If you have a new version of MIUI or Android, install it.

Features of updates for Redmi 9C:

• 🔄 MIUI 12.5 → MIUI 13: Improved memory optimization on devices with 2GB of RAM.
• 🛠️ Security Updates: Fix vulnerabilities that could slow down the system.
• 🎯 Core Patches: In some firmware versions (e.g, V12.5.4.0.RCRMIXM) was fixed bug with the interface freeze at a low charge level.

⚠️ Attention: If your Redmi is 9C purchased in China or India, there may be problems with updates OTA. In this case, we recommend using MIUI bootloader for manual installation of global firmware. Remember to backup before firmware!

5. Customization of animation and visual effects

MIUI is known for its beautiful animations, but on weak devices like the Redmi 9C, they only slow down the interface, and turning off or reducing the animation speed can give an increase in 10-15% smoothness.

Method 1: Through the Developer's Settings

1. Activate Developer Mode: Settings → About Phone → MIUI version (click 7 times).
2. Back to Settings → Additionally. → For developers.
3. Find the items: Window Animation Scale → Select Off. or 0.5x. Size of Transition Animation → Select Off. or 0.5x. Animator Duration → Select Off..

Method 2: Simplify the MIUI shell

• 🎨 Turn off the dark theme (if not used): Settings → Screen. → Dark mode.
• 🖼️ Install static wallpaper instead of live: Settings → Wallpaper.
• 📱 Turn off transition effects: Settings → Additionally. → System effects.

💡

Turning off animations is particularly noticeable in speeding up app opening and returning to the home screen.On the Redmi 9C with 2GB of RAM, this could cut Chrome or Instagram startup times by 20-30%.

6.Memory optimization and memory card use

The Redmi 9C came in versions with 32/64/128 GB of internal memory. If you have a 32 GB model, then after installing the system and basic applications, there is critically little space left — about 8-12 GB. This leads to memory fragmentation and slowdown.

How to make room:

• 📸 Move photos and videos to the cloud (Google Photos, Mi Cloud) or to PC.
• 🎵 Remove downloaded music from Spotify/Yandex Music (cache can weigh several GB).
• 🎮 Remove the game cache through Settings → Annexes → [play-name] → Memory. → Clear the cache.
• 📂 Use Files by Google to find and delete large files (>100MB).

Configure the memory card as an internal drive:

1. Insert a UHS-I (U1/U3) class microSD up to 512GB.
2. Go to Settings → Memory → Memory Map.
3. Select Format as internal memory (Warning: All data will be erased!).
4. After formatting, transfer the applications to the map: Settings → Applications → [select application] → Memory → Change → Memory Map.

⚠️ Note: Not all applications support porting to a memory card, and the speed of microSD will be lower than with internal memory, the best option is to store only media files (photos, videos, music) on the card, and leave the applications in internal memory.

7.Alternative launchers and lightweight applications

The standard MIUI launcher consumes up to 400-500MB of RAM, which is critical for the Redmi 9C with 2GB of memory. Alternative launchers can reduce system load and speed up the interface.

Top.-3 lightweight launchers for Redmi 9C:

We also recommend replacing the "heavy" applications with lighter versions:

• 📱 Facebook Lite instead of Facebook (saves up to 300MB of RAM).
• 💬 Messenger Lite instead of Messenger.
• 🌐 Chrome (Lite mode) or Brave Browser instead of standard Chrome.
• 📷 Snapseed or PicsArt Lite instead of Photoshop Express.

8.Reset to factory settings (last chance)

If all previous methods failed, it's a hard reset, a radical solution that will bring the smartphone back to its original state by removing all user data and settings. On the Redmi 9C, resetting helps in 90% of cases when the brakes are caused by software errors.

How to reset:

1. Create a backup copy of important data (contacts, photos, messages).
2. Go to Settings → About the phone → Reset settings.
3. Select Erase all data (reset to factory settings).
4. Confirm the action and wait for the completion (it will take 5-10 minutes).

What to do after the discharge:

• 🚫 Do not restore data from backup MIUI — It can bring back old mistakes.
• 📥 Install applications gradually, watching the performance.
• ⚙️ Turn off autoload and background activity immediately for unnecessary apps.
• 🔄 Update all apps through Google Play.

⚠️ Note: If the brakes are left after reset, the problem may be in the hardware (wear of flash memory, battery degradation, overheating of the processor.

FAQ: Frequent questions about Redmi 9C acceleration