What it means to optimize the device on the phone Xiaomi Mi: the complete guide

When you hear the phrase “optimize the device on the Xiaomi Mi phone,” it’s not just about surface cleaning the cache, it’s a set of measures aimed at restoring factory speed, extending battery life and freeing up memory from digital debris. Xiaomi’s MIUI-based smartphones are known for their functionality, but over time even they start to “brake” — apps open long, the battery goes down in a few hours, and free space melts before our eyes.

In this article, we’ll look at what Xiaomi Mi optimization (Mi 8 to Mi 13 Ultra) includes, what tools the developers have designed for it, and what you can do manually. You’ll learn how to clean up background debris, set up app startups, manage permissions to save charge, and even return the phone to its factory-fabricated freshness. And why the standard Optimization feature in Settings → Battery solves only 30% of the problems.

1. What is a phone optimization and why you need it

Optimization is not a one-off procedure, but a systematic approach to keeping your smartphone running, and in the case of Xiaomi Mi, there are three key aspects:

• 🔋 Performance: Elimination of lags, hangings and slow response to touch, most often caused by overloaded RAM or background conflict.
• 📱 Memory: freeing up internal storage from unnecessary files (cache, duplicate photos, remnants of deleted applications) is especially important on Xiaomi because of the peculiarities of the work. MIUI junk-file.
• 🔄 Energy efficiency: adjusting battery consumption, disabling “gluttonous” services and applications that discharge the phone even in standby mode.

According to internal tests by Xiaomi, after a year of active use, the smartphone loses up to 40% of its original performance due to accumulated digital garbage, and 65% of users never conduct deep optimization, limiting themselves to cleaning the cache through a standard menu, it’s like sweeping the floor without taking out a bucket of garbage.

⚠️ Note: If your Xiaomi Mi has become abruptly braked after the update MIUI, Don't rush to reset your settings. In 80% of cases, the problem is solved by rolling back to the previous version of the firmware via Fastboot or disabling the function. MIUI Optimization in the Developer.

2. Built-in optimization tools in MIUI

Xiaomi has integrated several basic optimization tools into its shell, which won't replace manual tuning, but will help keep the phone in order between "general cleaning" and where to look:

• 🧹 Waste cleaning: Settings → Annexes → Cleanup. You can delete cache, residual files and unnecessary files. APK. But beware – the feature often suggests removing useful application data (for example, saved passwords in the browser).
• ⚡ Battery Optimization: Settings → Battery → Optimization: The system will show applications that are consuming a lot of charge and suggest limiting their activity. MIUI, who may also be responsible for the scoring.
• 🔄 Autostart: Settings → Permits → Autorun. Disable unnecessary apps that run when you turn on your phone and hang in the background (such as games or instant messengers that you rarely use).

The most controversial tool is Security → Optimization. It promises to “speed up your phone by 30%,” but in practice it often simply removes background processes from your memory, which can lead to the loss of unsaved data in applications. For example, if you are working with a document in WPS Office and the system “optimizes” it, the changes may not persist.

3. Guide to deep optimization Xiaomi Mi

If the built-in tools don't work, it's time to move to manual methods. Here's a step-by-step plan that will bring your Xiaomi Mi back to speed:

Step 1: Cleaning up system debris

Standard cleaning through Settings removes only the tip of the iceberg.

1. Install Files by Google from Play Market and run storage analysis. The app will find duplicate photos, large files and unnecessary APKs.
2. Go to Settings. → Memory. → Files and manually check folders: Download – here accumulate downloads over the years; DCIM/.thumbnails — Photos and videos that can be removed; Android/obb — Cache of games (can weigh several GB).

SD Maid

Step 2: Optimizing RAM

MIUI aggressively manipulates RAM, killing the background processes, so it doesn't interfere with the work:

• Turn off Settings → Special Features → System Acceleration (this is an experimental feature that often causes lags).
• In Settings → Developer → Memory set the limit of background processes on the "Standard limit" (not "Without restrictions", otherwise the phone will brake).
• Use Greenify to hibernate unnecessary apps (works without root on Xiaomi via ADB).

Make a backup copy of important data|Charge your phone at least 50 times%|Disconnect the mobile Internet (to avoid interruption of the process)|Record the current screen and sound settings-->

Step 3: Set up the battery for maximum autonomy

Even on the new Xiaomi Mi, the battery can run out in a day due to background activity.

• 🔌 Turn off Settings. → Battery → Charging optimization (this is a function of adaptive charging that often works incorrectly).
• 📵 B Settings → SIM-Maps and mobile networks set the network mode on 4G (if you don't 5G), Reduce battery consumption for network search.
• 🌙 Activate the dark theme (Settings) → Screen. → Dark subject. AMOLED-This saves up to 15% of the charge on screens.
• ⏳ Set a Background Activity Limit for Social Media through Settings → Annexes → Battery management.

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If the battery is still running out quickly after optimisation, check the battery status through the engineering menu: dial ##4636## and select Battery Information. If the health score is below 80%, it is time to change the battery.

4. Optimization through Engineering Menu and ADB

For advanced users, there are ways to optimize Xiaomi Mi system-level, which require caution but yield the best results.

Method 1: Disabling MIUI Optimization

MIUI Optimization is designed to be smooth, but it often causes lags to turn it off:

1. Activate Developer Mode: Settings → About Phone → MIUI version (click 7 times).
2. Go back to Settings → More → For developers and find the MIUI Optimization option.
3. Turn it off and reboot the phone. The animations will become less smooth, but the system will run faster.

Method 2: Cleaning through ADB

If the phone is heavily littered, the team will help to reset the cache via ADB:

adb shell pm trim-caches 1000G


adb shell cmd package bg-dexopt-job

This command compulsorily clears the cache of all applications and optimizes DEX-So you can get your hands on files, which makes it faster to start programs. USB and execute commands in the terminal.

5. Optimization for specific Xiaomi Mi models

Some Xiaomi Mi models have unique features to consider when optimizing:

For Xiaomi Mi with Snapdragon 8xx processors (such as Mi 12 Pro), it is critical to monitor the heat output. If the phone heats above 45°C, MIUI automatically reduces performance by 30-40%.

• 🧊 Turn off high performance in Settings → Battery → Performance mode.
• 🎮 In games, set the chart to "Balanced" instead of "Maximum".
• ☀️ Avoid direct sunlight on the body – this is the main cause of overheating.

6. When Optimization Doesn't Work: Radical Measures

If Xiaomi Mi continues to slow down after all the manipulations, it is time to consider cardinal solutions.

• 🔄 Factory reset: This is an extreme measure, but it returns the phone to its original state.Before reset, back up through Settings → The phone. → Backup. Remember, after the reset, you'll have to reconfigure all the apps and accounts.
• 📥 Fastboot flashing: If the reset didn't work, it might be the firmware itself. Download the official firmware for your model from Xiaomi and run the phone through the Mi Flash Tool. This will delete all the data, but restore stability.
• 🔧 Replacement of thermopaste: For older models (Mi) 5, Mi 6) It's a very hot, dry heat paste, and if you're a repair expert, you can replace it with the Arctic. MX-4. This will reduce the temperature of the processor. 10-15°C.

⚠️ Note: On Xiaomi Mi models with unlocked bootloader (Mi 8 Explorer Edition, Mi 10 Ultra), flashing through Fastboot can lead to locking the device if you use unofficial firmware. Always check the hash amount of the downloaded firmware file.

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If the phone still brakes after resetting to factory settings, the problem is most likely in the hardware: worn flash memory, a damaged battery or a faulty processor, in which case software optimization will not help — you need repairs.

7. How to maintain an optimized state

Optimization is not a one-time action, but a regular process. To prevent Xiaomi Mi from “overgrowth” with garbage again, follow these rules:

• 📅 Weekly: Clear the cache through Settings → Memory. → Cleaning up garbage and checking autoload.
• 📱 Monthly: Perform a deep cleaning with the help of SD Maid or Files by Google, remove unused apps.
• 🔋 Every 3 months: Calibrate the battery (discharge to 0%, then charge to 100% without interruption) and check its health through the engineering menu.
• 🔄 Every 6 months: Backup and reset settings to factory settings (this prevents system errors from accumulating).

It is also worth limiting the use of heavy themes from MIUI Themes, which often contain animations that load the processor, preferring minimalist themes or using standard ones.

To automatically monitor the status of the phone, set:

• AccuBattery – for battery monitoring;
• Greenify – for hibernation of unnecessary applications;
• 3C Toolbox – for managing startup and processes.

FAQ: Frequent questions about Xiaomi Mi optimization