How to open a Mine menu on Xiaomi: Secrets of the engineering mode

Modern Xiaomi and Redmi smartphones have a complex architecture hidden from the eyes of the average user behind the shell of MIUI or HyperOS. However, for the diagnosis of hardware problems or deep screen calibration, there is a special section, often called the “Mine menu” or CIT (Customer Integration Test), access to which allows you to test sensors, screen matrix and communication modules without installing third-party software.

Many users confuse the engineering menu with the usual developer settings, but these are completely different levels of access to the system. The engineering mode gives direct access to the hardware of the device, allowing you to check the performance of each component separately, this is especially true when buying a used gadget or after a fall, when you need to make sure that the touchscreen responds correctly in all areas.

In this article, we will discuss in detail the safe methods for activating hidden functions, look at popular codes for various models and explain which parameters can be changed and which should not be touched categorically.

What is CIT and why does the owner of Xiaomi need it?

CIT (Customer Integration Test) is a set of hardware testing tools built into Android firmware. Xiaomi developers use this tool in factories to finalize the assembled smartphones before packaging. For the end user, it is an opportunity to access hidden features that are not displayed in the standard Settings menu.

Using this section, you can identify broken pixels, check the vibrator, assess the sensitivity of the microphone and speaker. Diagnostics through CIT is often more accurate than through third-party applications from the Play Market, since it works at a low level of interaction with device drivers.

⚠️ Warning: Changing the settings in the sections marked as "Factory" or "Engineering" may lead to unstable operation of the radio module or complete loss of network signal.

The main purpose of using the Mine menu is not “overclocking” or hidden optimization, namely checking the health of components. If your smartphone behaves strangely when calling or quickly discharges, battery and network tests will help localize the problem.

The main ways to activate the hidden menu

There are several proven methods that allow you to enter the testing mode. USSD-This method works on most models, including the Redmi Note and the Mi series.

To activate, you need to open the Phone app and dial a special combination of characters, the system automatically recognizes the code and redirects the user to the appropriate section without requiring the call button. If the code is entered correctly, the menu will open instantly.

• 🔢 Code ##6484## - Universal combination for entering the main menu CIT on most of Xiaomi devices.
• 🔧 Code ##4636## - opens the test menu for phone, battery and usage statistics (standard Android menu).
• 📱 Code ##64663## - an alternative version for some firmware versions MIUI.

It is important to understand that on new versions of HyperOS, some codes may be blocked by the carrier or the manufacturer in certain regions, in which case the system will simply ignore the input or issue a connection error message.

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If the code doesn't work, try entering it slowly, pausing between characters, and some models will only work with quick input.

Step-by-step instructions for entering through the "Phone" application

Let's take a closer look at the login process, because there may be nuances on different versions of the shell. First, make sure you have a standard call from Xiaomi or Google installed. Third-party call apps can intercept input and block system commands.

Take your time to avoid a character sequence error. If the menu doesn't open the first time, try closing the phone app completely through Task Manager and repeat the procedure.

Once you've entered it, you'll see a list of tests, each item corresponds to a specific module, for example, TouchPanel will run a touchscreen check, and Version will show you details of the software version and build date.

To exit the test mode, it is usually enough to press the Back button several times or select Exit at the end of the list.Reboot the device after checking is usually not necessary unless you make changes to the system files.

Diagnostics of equipment: analysis of the main tests

There are a lot of options inside the engineering menu, but not all of them are clear to the average user. Let's take a look at the most useful ones. The TouchPanel test lets you see how the screen responds to touch, and in this mode, the screen is painted in a certain color, and you have to swipe your finger across the surface.

If a line is interrupted or not drawn in an area, it means there is a sensor defect in that area, which is critical when buying a device from hand, as the seller may be hiding the presence of dead zones.

⚠️ Attention: Backlight test includes maximum brightness of backlight.Do not keep this test running for a long time, so as not to overheat the matrix and land the battery.

The Camera test allows you to quickly switch between the main, front-facing cameras and telephoto lens modules, checking their focus and the presence of black spots on the matrix, which is faster than opening a standard camera app every time.

Advanced settings and calibration of sensors

In addition to simple diagnostics, the Mine menu allows you to calibrate. For example, if your accelerometer is not working correctly (the screen is not rotating), the CIT menu often has an Accelerometer item that resets the sensor settings to factory values.

Calibration typically requires putting the phone on a flat horizontal surface and pressing the calibration button, which takes a few seconds, and then the gyroscope and accelerometer have to work more steadily.

Proximity is also available, and if you don't turn off your screen while you're talking, this test will show you if the sensor sees an obstacle (your hand or ear), and you'll see the distance in centimeters.

• 📉 5.0 cm - the sensor sees the object at a distance of 5 centimeters.
• 📏 0.0 cm - the sensor is closed completely.
• ❌ Error – sensor fails to respond or is contaminated.

Don’t abuse the Fastboot Test feature if you don’t know how to exit Fastboot mode.This can cause the phone to get stuck in boot mode and require a PC connection to recover.

Problem Solving: If the menu is not open

There are times when entering ##6484### doesn't work, which may be because your version of the MIUI shell has region-specific limitations, for example, in global versions for Europe, some diagnostic features may be cut down.

Alternatively, try logging in through standard settings. Go to Settings → About Phone → All settings and quickly press 7-10 times on “Kernel Version.” This will open the PC testing menu, but the functionality will be limited.

If nothing works, you can install a dedicated emulator app that creates a shortcut to sign in to CIT. However, using third-party software always carries security risks, so download such utilities only from trusted sources.

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If the codes don’t work, chances are your firmware version blocks access to the system-level engineering menu, and it’s impossible to get around this without root rights.

Security measures and warnings

Although the engineering menu is designed to be diagnostic, careless handling of it can harm the device, and the main danger lies in the section responsible for the radio module and frequencies, changing ranges can cause the phone to stop seeing your carrier's network.

Never change the values in the partitions whose name doesn't tell you anything. Factory Reset will delete all your data without recovery, so always back up.

⚠️ Warning: Attempting to reflash or modify IMEI An engineering menu is illegal in many countries and can permanently disable a device.

Use the Main menu only for its intended purpose - to check the health of components. If you find a malfunction, you should contact the authorized service center Xiaomi, especially if the device is warranty.

Frequently Asked Questions (FAQ)