How to speed up Xiaomi Redmi 9 with NFC: from cache cleaning to hidden settings MIUI

Xiaomi Redmi 9 with a NFC — One of the most popular budget smartphones with contactless payments, but over time even it starts to slow down. MIUI. In this article, we will analyze 10 proven ways to return the previous speed of work – from basic actions to hidden firmware functions.

It's important to understand: Redmi 9 Powered by MediaTek Helio processor G80 and 3/4 GB of RAM (depending on the modification) is not a flagship, but when set up correctly, the phone can run fast even through the phone. 2–3 We're not going to recommend buying a new gadget, but instead we're going to show you how to make the most of it.

All methods in the article are tested on current versions MIUI 12-14 (including global and European firmware) if your Redmi 9 NFC It runs on an older version, upgrade the system first – this often solves half of the performance issues.

1. Diagnosis of the current state: what exactly is inhibiting?

Before you optimize, you need to understand the source of the lags. Redmi 9 NFC There are built-in diagnostic tools:

1. Checking CPU boot: Go to Settings → The phone. → Status of the system → CPU usage: If the processor load is constantly above 50% in idle – the problem is in the background software.
2. Memory analysis: In the same section, see Memory Use. If less than 500MB is available, you should clean the cache or delete the applications.
3. Storage Test: Use the Security App (Security) → Optimization → Deep cleanup, the system will show which files take up the most space.

Typical "culprits" of brakes on Redmi 9 NFC:

• 📱 Social media (Facebook, VK, TikTok – consume up to 30% of CPU in the background.
• 🎮 Games (PUBG Mobile, Free Fire – even after closing, process memory is left in the memory.
• 🔄 Auto-Update Apps – Google Play and MIUI App Stores can update software at inappropriate times.
• 📡 Weak network signal – the phone spends resources on finding a connection.

⚠️ Attention: If in Settings → Battery. → The battery you see is the Android System or MIUI Daemon consumes more than 20% of the charge, which is a sign of a system failure. → SIM-maps and mobile networks → Resetting network settings).

2. Cleaning the system: remove garbage and cache

The first thing to do is to free up space on the internal drive.Redmi 9 NFC It has 64 or 128 GB of storage, but even that doesn't last long if you don't keep track of the files:

Removal of the application cache

Cash speeds up the software, but eventually it becomes a garbage dump.

1. Open Settings → Applications → Application Management.
2. Choose an app (such as Chrome or Facebook).
3. Press Warehouse. → Clear the cache.

For mass cleaning, use the built-in Security app:

1. Launch Security → Cleanup → Deep cleaning.
2. Check all items (cache, residual files, duplicates).
3. Press Clean (can take 2-5 minutes).

2.2. Deletion of unnecessary files

Downloaded APK, Old photos and videos take up gigabytes:

• 📁 Use the Files. → Categories → Downloads to remove unnecessary APK documents.
• 📸 To the Gallery. → Albums. → Screenshots remove old screenshots (they weigh 2-5 MB each).
• 🎵 Check the Music folder – often there are songs from messengers.

Transfer of data to SD-map

Redmi 9 NFC It supports microSD up to 512 GB:

• 📷 Photo and video (Gallery) → Select → Move it to SD).
• 🎵 Music and podcasts.
• 📄 Documents (PDF, Word).

⚠️ Note: Do not transfer applications to SD-Map through Settings → This will slow them down due to the low speed of microSD reading (even class). A1). The exception is games that support Adoptable Storage (but this requires formatting the map as an internal storage device).

Remove social media cache|Clear the Download folder|Move the photo to SD-map|Check the autoloading of applications|Remove unused items APK-->

3. MIUI Optimization: Hidden Settings for Acceleration

MIUI It has a lot of hidden features that you can use to overclock, and many of them are undocumented, but they work consistently.

3.1. Disabling animations

Animations make the interface look more beautiful, but they slow it down.

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 → Disable; Transition animation scale → Disable; Animation duration → No animation.

The interface will respond 15-20% faster, especially when opening applications.

Limitation of background processes

By default. MIUI It allows applications to run in the background without restrictions:

1. Go to Settings. → Battery. → Application power management.
2. Select Application Selection and set Restricted Mode for most programs.
3. An exception is made for instant messengers (Telegram, WhatsApp) and system applications.

For a radical limitation:

1. In For Developers, find a Process Limit.
2. Set a process maximum 2 value in the background (this will reduce multitasking but speed up current tasks).

Switch to light mode MIUI Lite

In the firmware MIUI 12+ There's a lightweight interface mode:

1. Open the Settings. → Display. → Display mode.
2. Select Easy Mode (short shadows, simplified icons).

It'll reduce the load on you. GPU Mali-G52, This is especially true in games and when scrolling lists.

💡

If after disabling animations, the phone began to react too sharply, return the scale of animation to the value 0.5x — It is a trade-off between speed and smoothness.

4.Firmware and kernel updates: when it helps

Sometimes the brakes are caused by firmware bugs. Xiaomi regularly releases patches to fix performance issues.

1. Go to Settings → About the phone → System update.
2. If you have an update, install it. For Redmi 9 NFC critically upgrade to at least MIUI 13, as older versions have a memory management bug that causes apps to spontaneously close.

⚠️ Warning: Installing unofficial firmware requires unlocking the bootloader and may result in a loss of warranty.On Redmi 9 NFC It's also offline. NFC before re-binding to Settings → Connected devices → NFC.

5. Hardware tricks: acceleration and cooling

Redmi 9 NFC It is not designed to overclock, but there are legal ways to improve its performance:

Activation of the performance mode

V MIUI There is a hidden mode for games and heavy tasks:

1. Open the Settings. → Battery. → Power regimens.
2. Select Performance (increases CPU clock frequency).

The battery will go down 10-15% faster.

5.2. Temperature control

Overheating above 45°C MediaTek Helio G80 automatically reduces the frequency (trottling) to avoid this:

• 🧊 Use heat sink covers (such as those with aluminum inserts).
• 🌬️ Do not close the vents (they are located in the lower part of the case).
• 🎮 During games, turn off the charging – this reduces heating.

5.3 Optimization for gaming

For gamers in MIUI There's a Game Turbo:

1. Start the game, swipe from top to bottom and click the Game Turbo icon.
2. Enable options: Performance mode; Disable autobrightness; Block notifications.

💡

Performance mode in MIUI temporarily disables the battery’s background optimization, which gives an increase FPS 5-to-10%.

Radical measures: dumping and alternative firmware

If nothing works, then extreme methods remain: they take longer, but often return the phone to a second life.

6.1 Hard Reset (Hard Reset)

Resetting to factory settings removes all data, but cleans the system of garbage.

1. Save important data (photos, contacts) on SD-map.
2. Go to Settings → About Phone → Resetting → Erase all data.
3. Confirm the action and wait for the reboot (it will take 5-10 minutes).

Instructions for Redmi 9 NFC (codename):

1. Unlock the bootloader through the Mi Unlock Tool.
2. Install TWRP Recovery (Lancelot version).
3. Download the firmware (e.g. LineageOS 19).
4. Flow through TWRP (wipe dalvik, cache, system before installation).

⚠️ Attention: On custom firmware NFC It may not work with contactless payments (Google Pay, SberPay). NFC Fix.

7. Optimization for specific tasks

Depending on how you use your phone, you can improve your performance.

7.1 For social networks and instant messengers

• 📱 Turn off autoplay video in Settings Facebook/TikTok → Video settings.
• 🔕 In Telegram, turn off the animation stickers: Settings → Animation. → No animation.
• 📂 Limit the messenger cache to 100MB: Settings → Warehouse → Limit the cache.

For photographs and videos

• 📸 In the cell, turn it off. AI-regime HDR (speeds up).
• 🎥 For the video, use permission. 1080p@30fps instead 4K.
• 🖼️ In the Gallery, turn off animations when scrolling.

7.3. for navigation (Yandex.Maps, Google Maps)

• 🗺️ Download maps in advance (offline mode reduces the load on the network).
• 📍 Turn it off. 3D-building-up.
• 🚗 In the navigator, select Economy Mode (fewer location updates).

FAQ: Frequent questions about Redmi acceleration 9 NFC