Changing Xiaomi system settings: a detailed user guide

What are Xiaomi system settings and why they are being changed

Xiaomi smartphones based on MIUI HyperOS offers users extensive customization options, but beyond the standard interface settings, there is a whole layer of system settings — low-level configurations that affect the operating system, hardware, and embedded services. These settings are usually hidden from the average user, as their change can both improve the performance of the device and lead to unstable operation.

The main reasons users use modifications to system settings are performance optimization (e.g., disabling background activity of unnecessary processes), unlocking hidden functions (e.g., activating Developer Options), fixing firmware bugs, or adapting the device to specific tasks. However, it is important to understand that such changes often require superuser rights (root) or the use of engineering codes, which automatically deprives warranties and increases security risks.

In this article, we'll look at what settings can be changed, how to do it safely, and what consequences can arise from incorrect actions. MIUI New HyperOS and legal optimization methods without the risk of “bricking” the device.

What system settings can be changed on Xiaomi

Xiaomi system settings are divided into three categories: those available through the standard menu, those that are hidden (activated through engineering codes), and those that require root rights.

The first category includes parameters that can be changed without additional manipulation:

• 🔧 Developer Options: Debugging is available here USB, imitation of secondary displays, limitation of background processes, etc.
• ⚡ Battery Optimization: Manual Energy Management for Individual Applications, Disable Auto Start.
• 📡 Network settings: Selection of preferred network type (2G/3G/4G/5G), setup APN manually.
• 🔒 Security: Managing permissions for applications, setting up bootloader lock.

The second category includes hidden menus available through the USSD-codes or keyboard combinations:

• 📞 ##4636## - Menu testing and usage statistics (information about battery, network, Wi-Fi).
• 🔍 ##225## - check the calibration of sensors (accelometer, gyroscope).
• 📶 ##4634## - data about the communication module (IMEI, antenna).

The third category is settings that require root rights or modified firmware, which include:

• 🛠️ Change in processor frequency (undervolting/overclocking) via Kernel Adiutor.
• 🗃️ Modification of system files (/system/build.prop) Unlocking features (e.g., VoLTE on uncertified models).
• 🔄 Replacement of standard applications (de-bloating) or firmware through TWRP.

⚠️ Warning: Changing the parameters of the third category may lead to loss of warranty, blocking IMEI On models with HyperOS (for example, Xiaomi 14 or Redmi Note 13 Pro)+) Such manipulations most often lead to the activation of Anti-Rollback, a mechanism that blocks the rollback of previous versions of the firmware.

How to Safely Change System Settings Without Root

If you're not willing to risk the stability of your device, but you want to optimize it, start with legal methods. Most of them are available through Developer Mode or standard menus. MIUI/HyperOS.

To activate Developer Options, follow the following steps:

1. Go to Settings. → The phone.
2. Find the MIUI version (or HyperOS version) and tap it 7 times in a row.
3. Enter the screen unlock password if required.
4. Return to the main settings menu – there will be a new section for developers.

In this section, you can safely change:

• 🔄 Windows animation (accelerating transitions between applications).
• 📱 Screen resolution (forced) FHD+ instead HD+ on some models).
• 🔋 Background processes (limitation to 2-3 Simultaneously working applications to save battery).
• 🔊 Debugging by USB (necessary to connect to ADB or Fastboot).

For deeper optimization without root, you can use it ADB-For example, disabling unnecessary system applications (without removing them):

adb shell pm disable-user --user 0 com.miui.analytics

This command disables Xiaomi’s analytics service, which can reduce the CPU and battery load. A full list of safe packets to disable can be found on thematic forums (e.g., on the Web site, 4PDA or XDA Developers).

⚠️ Note: Do not disable system processes called com.android. or com.qualcomm. – this can lead to loss of functionality of the communication module or camera. ADB-Teams may not work due to a modified security architecture.

Risks of changing system settings and how to avoid them

Even seemingly harmless changes can have unpredictable consequences, and consider the main risks and ways to minimize them:

Especially careful should be the owners of devices with HyperOS. the new firmware from Xiaomi uses enhanced protection mechanisms, such as:

• 🔐 Anti-Rollback: blocks rollbacks to older versions of software, which can make the device unusable after a failed modification.
• 🛡️ Secure Boot: Checks the integrity of system files when booting, locking the device when changes are detected.
• 🔗 Mi Account Linking: On some models, resetting requires entering account data associated with the device.

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Before any changes to system files, create a full backup through TWRP or the standard menu settings → Additionally. → Backup and reset, which will restore the device to work even after a major failure.

Xiaomi Engineering Codes: Hidden Opportunities and Dangers

Engineering codes (USSD or MMI) They provide access to service menus where you can test hardware components or change hidden parameters, but their use is fraught with risks - for example, incorrect calibration of sensors can lead to malfunction of the gyroscope or accelerometer.

Here are the most useful and relatively secure codes for Xiaomi:

• 📱 ##6484## - Touch screen test (multi-touch check).
• 🔈 ##64663## - Audio test (dynamics, microphone, headphones).
• 📷 ##0*## - Display test (check for broken pixels).
• 📶 ##4636## → Battery information - the real level of battery wear.

Dangerous codes that can cause failures:

• ⚠️ ##36446337## - Hardware test (may cause a reboot).
• ⚠️ ##7594## - Forced shutdown of the device (risk of loss of unsaved data).
• ⚠️ ##273283*255*663282*## — Data reset to factory (without warning!).

On HyperOS devices, some of the engineering codes can be blocked, such as the code to reset battery statistics (#4636## → Resetting statistics) may not work due to the changed security policy, in which case the alternative is to use the data. ADB:

adb shell dumpsys battery reset

Root rights to Xiaomi: is it worth the risk?

Getting root-rights opens access to deep customization of the device, but at the same time deprives it of warranty and increases vulnerability to malware. On Xiaomi devices, the root process usually involves unlocking the bootloader through the official Mi Unlock Tool, installing a custom Recovery (TWRP) and Magisk firmware.

Benefits of root:

• 🔧 Full control over system files and applications.
• 🗑️ Ability to remove embedded software (bloatware).
• ⚡ Using applications for fine-tuning CPU/GPU (For example, Kernel Adiutor).
• 🔒 Access to features blocked by the manufacturer (e.g. recording conversations on some models).

Disadvantages and risks:

• ⚠️ Loss of warranty (even if you later remove root, traces remain in the boot section).
• ⚠️ Lockdown OTA-Updates (you will need to manually update them).
• ⚠️ Malware vulnerability (root-access applications can steal data).
• ⚠️ Risk of "brick" (converting the device into a "brick") with firmware errors.

The process of unlocking the bootloader on Xiaomi includes:

1. Linking your Mi Account to your device (required!).
2. Waiting. 7-168 hours (depending on the model) after the.
3. Use the Mi Unlock Tool in Fastboot mode.
4. Firmware TWRP Magisk installation for root rights management.

⚠️ Note: On HyperOS devices (e.g. Xiaomi) 13T or Redmi K60) The process of unlocking is complicated. The manufacturer has introduced an additional anti-Rollback check, and incorrect firmware can lead to permanent locking of the bootloader. XDA Developers or 4PDA.

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If you need root rights only to remove embedded apps, consider the alternative of disabling them through ADB (This is less risky and does not require unlocking the bootloader.

How to Get Everything Back: Recovery from Failed Changes

If the system settings have been modified to make the device unstable, there are several ways to return it to its original state, depending on the severity of the problem:

Soft reset (soft reset):

• 🔄 Reboot the device (hold the power button) 10-15 seconds).
• 📱 Resetting settings through Settings → Additionally. → Backup and reset (does not delete user data).

Hard reset (hard reset):

• 🔧 Go to Recovery Mode (Power button) + volume).
• 🗑️ Choose Wipe. Data/Factory Reset (deletes all data!).

Firmware via Fastboot:

1. Download the official firmware for your model from en.miui.com.
2. Unpack the archive and launch the script flash_all.bat (Windows or flash_all.sh (Linux/Mac).
3. Connect your phone in Fastboot mode and wait for the process to be completed.

For devices with a damaged boot partition, firmware may be required through EDL-Emergency Download Mode: This method requires an authorized Mi Account and special equipment (Qualcomm) HS-USB QDLoader 9008).

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If the device does not turn on after firmware, try holding the power button. 30-60 Seconds – sometimes it helps to wake up the power controller.

FAQ: Frequent questions about changing Xiaomi system settings