Why Xiaomi Redmi Note 7 is slowing down and how to fix it in 2026

Your Xiaomi Redmi Note 7 is slowing down, apps are slow to open, and animations are hanging? That's a typical smartphone issue, Released in 2019, but with the right approach, it can be solved without replacing the device. In this article, 12 proven ways to get the phone back on track, from basic settings to deep optimization.

The reasons for the Redmi Note 7 brakes fall into two categories: software (clogged memory, background processes, outdated software) and hardware (battery wear, overheating, damaged flash memory). We will break both groups, starting with the simplest solutions. Importantly, some methods require unlocking the bootloader or root rights, which we will highlight separately with the warnings.

If the phone is not just slowing down, but accidentally rebooting, it turns off when 20-30% If you're charging or heated without a load, you might have a battery problem.

1. Diagnosis: how to understand what exactly inhibits

Before cleaning your phone, identify a bottleneck.

• 📊 Go to Settings. → The phone. → Version. MIUI and tap 7 times on the kernel to activate Developer Mode.
• 🔍 Back to Settings → Additionally. → For developers and include Processor Statistics and Debugging by USB.
• 📈 Install the app CPU Monitor (from APKCombo if it is not in the Play Market) and check the booting of cores in simple and under load.

Typical symptoms and their causes:

Critical information: if in CPU Monitor you can see that the cores of the Kyro 260 (in the Snapdragon 660) constantly operate at a frequency below 1.8 GHz when loaded - a problem in overheating or battery wear.

2. Cleaning the system: remove garbage and cache

Redmi Note 7 has 3/4 GB RAM (depending on the modification) and eMMC 5.1 The first thing you need to do is to make room and dump the cache.

Cleaning instructions:

1. Remove unnecessary apps through Settings → Annexes → Application management. Pay attention to programs with background activity (messengers, launchers, games).
2. Clear the cache: Settings → Warehouse → Cache data. → press "Clear».
3. Use the built-in Optimizer: Security → Optimization → «Deep cleaning».
4. Remove duplicate photos and videos using Google Photos or Gallery Doctor (preinstalled in Google Photos) MIUI).

For deep cleaning of system debris:

Remove unused items APK|Clear the Dalvik cache (requires root)|Disable Auto-Update Applications|Transfer files to SD-card (if supported)|Reset the network settings-->

Note: Do not use cleaners like Clean Master or CCleaner, which often delete important system files. MIUI And they can make the brakes worse.

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If, after cleaning the cache, the applications began to load for a long time on the first run, that's normal. 1-2 utilization.

3. MIUI Optimization: Turning off animation and background processes

Shell MIUI It's known for its heavyweight, especially on older versions. Even on the Redmi Note 7 with the Snapdragon 660, excess animation and background services can eat up to 30% of performance.

How to speed up the interface:

• 🎨 Turn off animation: Activate Developer Mode (see Section 1) and install: Windows animation = 0.5x Animation of transitions = 0.5x Duration of the animator = 0.5x
• 🚫 Limit background processes: In For Developers, select Process Limit → Maximum 2 process in the background.
• 🔄 Turn off autosynchronization: Settings → Accounts. → Synchronization → uncheck any unnecessary services (e.g. Mi Cloud if you are not using it).
• 📴 Reduce the number of widgets on the home screen – they constantly update data in the background.

If you use a third-party launcher (like Nova Launcher), try returning the standard one. MIUI Launcher.Third-party shells may conflict with system services.

4. firmware update: is it worth switching to a new one MIUI

Redmi Note 7 Officially Supported MIUI 14 (based on Android 11), but many users note that after the updates the phone starts to brake more. MIUI Optimized for fresh models, and Snapdragon 660 may perform worse.

What to do:

• 🔄 If the phone brakes after the update, try to roll back to the previous version via Fastboot (instructions below).
• 🛠️ If you stand on MIUI 12 or older - upgrade to MIUI 14, but only through a complete reset (see section 6).
• 🚀 For experienced: install custom firmware such as Pixel Experience or LineageOS (requires unlocking the bootloader).

How to check the current version of MIUI:

1. Open the Settings. → The phone.
2. Check out the MIUI version and the Android version.
3. Compare it to the latest stable builds on Xiaomi’s official website.

Note: when you roll back to the old version MIUI There is a risk of blocking via Fastboot. IMEI Backup with the Mi Flash Tool and follow the instructions in section 7.

5. Battery problems: how battery wear affects performance

Redmi Note battery 7 (model BM47, 4000 mAh after 2-3 years of operation lost 30-40% When the battery is worn out, the phone automatically limits performance to reduce heat and extend the life of the phone.

Signs of battery wear:

• 🔋 Phone turns off when you're on 20-30% charge (real charge below the displayed charge).
• 🔥 Heated without load (even in simple).
• ⚡ Fast discharge (less than 4 hours of screen time).
• 🐢 Brake when connected to charging (due to power limitation).

How to check the status of the battery:

1. Install AccuBattery (from APKPure if not in the Play Market).
2. Charge your phone to 100% and see the Real Capacity in the Health section.
3. If the capacity is below 2500 mAh, it is time to change the battery.

The cost of replacing the battery in 2026:

Important: after replacing the battery, be sure to calibrate the controller - discharge the phone before 0% and charge up 100% breaklessly 2-3 successively.

6.Reset to factory settings: when it really helps

If all previous methods failed, the last chance before repairing is Hard Reset, which will delete all data, but return the phone to factory performance.

When to do the reset:

• 🤖 The phone brakes even after cleaning and optimizing.
• 📱 System applications (such as Settings or Calls) are constantly crashing.
• 🔄 After updating MIUI Critical lags have emerged.

Step-by-step:

1. Backup important data through Settings → Additionally. → Backup and reset → Local backups.
2. Move the backup to your computer or cloud (like Google Drive).
3. Go to Settings → Additional → Backup and Reset → Reset settings.
4. Choose to erase all data and confirm the action.
5. After the reboot, set up the phone as new (don’t restore data from the backup right away – check the performance on a “clean” system).

Warning: If the phone still brakes after reset, the problem is most likely hardware (memory, processor, motherboard), in which case only repair or replacement of the device will help.

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Factory reset deletes all data, including files in internal memory. MIUI Cloud – it may not recover properly.

7. Radical methods: unlocking the bootloader and custom firmware

If you're willing to take risks, you can try unlocking the bootloader and installing an alternative firmware.

• ⚡ More recent version of Android (such as Android) 12/13 Android 11).
• 🧹 Lack of built-in debris MIUI (Advertising, unnecessary services).
• 🎯 Ability to fine-tune the processor core (e.g. Kernel Adiutor).

Step-by-step instructions for unlocking the loader:

1. Register on the official Xiaomi website and get permission to unlock (can take up to 7 days).
2. Download the Mi Unlock Tool and connect your phone in Fastboot mode (clip Power + Volume down when the phone is off).
3. Follow the instructions of the program to unlock.
4. After unlocking, install TWRP Recovery and sew custom firmware (e.g. Pixel Experience).

Risks:

• 🚨 Loss of warranty (if it is still valid).
• 🔧 The ability to “brick” the phone when firmware error.
• 📵 Certain functions (e.g, NFC or IR-blaster) may not work properly.

For Redmi Note 7, recommended firmware:

8 Hardware Problems: When It's Time to Bring to the Service

If none of the software methods worked, the problem is likely hardware.Typical hardware faults of the Redmi Note 7:

• 💾 Depreciation of flash memory (eMMC): after 2-3 During years of intensive use, memory cells degrade, which leads to lags when reading/write.
• 🔌 Problems with the motherboard: oxidation of contacts, the dumping of memory chips or processor.
• 🌡️ Processor overheating: dried heat paste or damaged radiator.
• 📡 Communication module malfunction: if the brakes are accompanied by loss of network or Wi-Fi.

Signs of hardware problems:

• 🔄 The phone accidentally reboots when heated.
• 💥 Flying to Fastboot or Recovery for no reason.
• 📉 Productivity falls even after resetting.
• 🔊 Artifacts appear on the screen or sound distortions.

The cost of repairs in 2026:

Warning: If the phone stops turning on after falling or getting moisture, don't try to flash it, it can permanently disable the motherboard.

For residents of Moscow and St. Petersburg, we recommend services:

• 📍 Xiaomi Service Center (Official, Warranty Repair).
• 📍 FixPrice (fast repair, but not always quality parts).
• 📍 Local workshops with good reviews (for example, Remonster or IRapair).

FAQ: Frequent questions about the Redmi Note 7 brakes