Introduction: why you need a reference on Xiaomi smartphones
If you’ve ever looked at Settings → A Xiaomi phone, you’ve probably noticed the System Directory (or System Manual in global firmware) section, which often goes unnoticed, even though it contains critical information about your smartphone, from specifications to operating instructions. But what exactly is behind the name and how to use it?
Xiaomi’s Guide is not easy PDF-A file with instructions, as many people think, is a dynamic database integrated into firmware. MIUI It's called HyperOS, which is updated with the system, and it includes official manuals from the manufacturer, certification data, and hidden parameters that are not displayed in the standard interface. For example, here you can find unique error codes for diagnosing hardware problems that even the engineering menu does not show.
In this article, we will discuss in detail:
- 📱 Where is the directory and how to open it on different models (Redmi, POCO, Xiaomi)
- 🔧 What information it contains and how to apply it in practice
- ⚡ How to Update the Directory and Correct Access Errors
- 🛠️ Hidden opportunities that are not written in the official instructions
Where to find a directory on Xiaomi: step-by-step instructions
The layout of the directory depends on the firmware version and device model. On most smartphones with MIUI 12-14 or HyperOS, the path looks like this:
- Open the settings (cog icon).
- Scroll down and select About Phone.
- Slip on the System Directory (or System Manual in global versions).
On some devices, such as the POCO F5 or Redmi Note 12, the directory can be hidden deeper:
- 🔍 B Settings → Additionally. → Special facilities → Reference book (rarely, but found on custom firmware).
- 📄 On older models (Redmi) 4X, Mi A1) — form PDF-file MIUI/Manual (Available through the file manager).
If there is no “reference” at all, it may mean:
- ⚠️ You have an old firmware (before you have it). MIUI 10), where the reference was in format PDF.
- 🔄 The firmware has been modified (for example, custom LineageOS), and the partition has been removed.
- 🌍 You have a global version with a stripped-down functionality (in some regions the directory is hidden).
💡
If the directory doesn't open, try resetting the Settings app through Settings → Apps → App Management → Settings → Storage → Clear the data. This often solves the access problem.
What information does the Xiaomi directory contain?
The handbook is not just a manual, it's a complete technical documentation. Here's what you'll find.
| Section of the handbook | What does it contain? | Example of data |
|---|---|---|
| Technical specifications | Detailed specifications of the processor, memory, screen, battery | Processor: Qualcomm Snapdragon 8 Gen 2 (4 nm), frequency up to 3.2 GHz |
| Certificates and standards | Information on certification (FCC, CE, RoHS) and network support (5G, VoLTE) | 5G support: Band n1, n3, n5, n7, n8, n28, n38, n41, n77, n78 |
| Error codes | List of hardware and software errors with decryption | E:3004 - Failure of the NFC module |
| Instructions for use | Official Guidelines for Setup, Safety, Care | Recommendations for battery charging to extend service life |
| Hidden functions | Undocumented features (e.g. engineering codes) | Code #4636## for network testing |
The error code section is especially useful, for example, if your Xiaomi 13 Pro suddenly stopped charging, the directory can show the E:2001 code, which means a problem with the power controller, which will help to more accurately diagnose a malfunction before repair.
How to find hidden engineering codes in the directory?
How to update the directory on Xiaomi
The directory is updated automatically with the firmware, but sometimes manual updates are required — for example, after resetting or installing custom firmware.
Check the current version of the firmware in Settings → About the phone
Connect to stable Wi-Fi (update can weigh up to 50MB)
Go to Settings → About the phone → System directory → Update
If there is no “Update” button, clear the Settings app cache
Restart the device after the update-->
If the guide is not updated, try the following methods:
- 🔄 Resetting the directory settings: delete the com.android.settings app data via Settings → Annexes.
- 📥 Manual loading: on some models (e.g, POCO X5 Pro) you can download the current directory from the official Xiaomi website and install it as APK.
- 🛠️ Firmware reflashing: if the directory is damaged, a complete reinstallation of the firmware through Fastboot will help.
💡
Updating the directory is critical after a motherboard replacement or repair — it contains data on new hardware components that the system must recognize.
On devices with HyperOS (e.g. Xiaomi 14 or Redmi K70), the directory is updated via Settings → About Phone → Software Update – it is included in the system update package and does not require a separate download.
Common directory errors and how to fix them
Users often encounter problems with the directory, and here are the most common errors and their solutions:
⚠️ Note: If after the update MIUI The directory has become empty or shows the error com.android.settings stopped, do not try to delete it through ADB — This can cause a system failure. Instead, reset your settings through Settings. → Additionally. → Resetting settings (select “Reset application settings»).
| Mistake. | Reason. | Decision |
|---|---|---|
| The directory won't open. | The cache of the Settings application is damaged | Clear cache and data from com.android.settings |
| Outdated information is displayed | The firmware hasn't been updated in a long time. | Update MIUI/HyperOS to the latest version |
| Error No manual found | Reference Removed or Not Installed | Install the APK directory manually (download from the official website) |
| Crash at opening | Conflict with the subject of design | Return the standard theme to Settings → Screen → Theme |
If none of the methods worked, check the integrity of system files via Fastboot:
fastboot flash system system.img
fastboot rebootAttention:
Hidden Reference Opportunities You Didn't Know About
Few people know that the Xiaomi handbook contains not only official documentation, but also hidden diagnostic tools.
- 🔧 Testing hardware components: in some models (e.g. Xiaomi) 12T) The handbook contains a link to the hidden test menu. To open it, hold the Volume button. + handbook.
- 📡 Network modulation data: In the Network section you can see detailed information about supported bands 5G, which does not show the standard settings.
- 🔋 Log of charging cycles: the directory keeps track of the number of full battery charging cycles - this will help to assess its wear.
On HyperOS devices, a new feature, Update History, is introduced in the directory, and you can see not only the current firmware version, but all previous updates with installation dates, which is useful if you want to roll back to a stable version after a failed update.
adb pull /data/system/manual/logs/ .Files will be saved to the current folder on the computer.-->
Handbook on custom firmware: features and risks
If you use an informal firmware (e.g. LineageOS, Pixel Experience or MIUI EU), the directory may not work properly or at all.
- ⚠️ On custom. MIUI (For example, xiaomi.eu, the directory is often replaced with a simplified version without technical data.
- 🛠️ Nana AOSP-There is no firmware (like LineageOS) directory - instead, the standard Android System Manual is used.
- 🔄 To restore the original directory, you need to return the stock firmware through Fastboot.
If you still want to access technical documentation on custom firmware, there are workarounds:
- Download the official reference for your model from the Xiaomi Manuals website.
- Install. APK-Manual file (allow installation from unknown sources).
- Use alternative applications such as Device Info HW or AIDA64 to get similar data.
⚠️ Note: In some custom firmware, installing an official directory may cause conflict with system libraries. TWRP Or OrangeFox.