Main Menu Xiaomi: How to log into the hidden engineering menu

Owners of Xiaomi, Redmi and Poco smartphones often face the need to access hidden functions of the operating system. Querying the main menu xiaomi how to log in usually involves trying to get into the engineering menu or hardware testing mode, which is hidden from the average user by standard methods. This part of the system allows for deep diagnostics of the display, sensor, speakers and communication modules, which is indispensable when checking the device before buying or after repair.

However, accessing these settings requires caution. Changing the settings in EngineerMode or Factory Mode without understanding their purpose can lead to a radio module malfunctioning or a complete recalibration of the screen. In this article, we will detail the safe ways to enter, explain the difference between the usual settings menu and the engineering section, and provide current codes for different versions of the MIUI and HyperOS shell.

It is worth noting that Xiaomi’s policy is constantly changing, and some codes can be blocked in new versions of the firmware. ADB-It's important to understand that logging into the engineering menu doesn't require a Root license, but it gives you access to critical system settings.

What is Main Menu and Engineer Mode in Xiaomi smartphones

Main Menu is often not a major screen menu (launcher) in diagnostics, but a specialized section of CIT (Customer Integration Test) or Engineer Mode, a hidden interface developed by plant engineers to first check components of a device before packaging, where you can run an automatic test of each sensor, check the broken pixels on the matrix or assess the sensitivity of microphones.

Another thing to mention is Engineering Mode, which is often confused with CIT. If the first one is designed to test hardware, the second one allows you to change the software settings of radio modules, the preferred network type (LTE/3G/2G) and power consumption parameters, and this is where you find settings that can dramatically affect the quality of communication in your region.

The average user rarely has to climb into these wilds, but knowing they exist is helpful, for example, when buying a used smartphone through CIT, you can quickly identify a restored screen or a faulty vibrator that looks perfect on the outside, a powerful tool for checking the honesty of the seller.

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Before entering the engineering menu, be sure to charge the device up to 50%, as some tests (such as a screen or flashlight) consume a lot of energy.

Ways of entering through secret USSD-code

The fastest and most common method of accessing hidden features is using special character combinations entered through a standard phone book, which run at the system level and do not require additional software installation. However, as mentioned earlier, in new versions of MIUI 14 and HyperOS, some combinations can be blocked by developers for security reasons.

To enter the code, open the Phone app, go to dial and enter the sequence of characters. If the code is active, the menu will open instantly. If nothing happens after entering the last digit or an error message appears, then this method is blocked on your firmware.

Below is a table of basic codes relevant to most Xiaomi, Redmi and Poco models.Please note that performance may depend on the regional version of the device (Global, China, EU).

Use of MIUI Hidden Settings app

If standard USSD-codes stopped working, which often happens after system updates, a third-party, but time-tested solution comes to the rescue - the application MIUI Hidden Settings.This is a utility available on Google Play that is actually a shortcut for hidden Android system activity adapted to the Xiaomi interface.

The application doesn't require superuser rights and is safe to use. It just opens the same windows that are available through codes, but through Intent system calls. This allows you to bypass keyboard locking. Once installed, you just need to select the section of interest from a list, such as "CIT" or "Engineering Mode."

It's important to download the original app, because clones can contain ads, and in the app list it can be simply called "Hidden Settings" or "MIUI Settings," which is the most reliable way to get into the main diagnostic menu on modern smartphones.

Access through ADB and computer diagnostics

For advanced users who need access to deep Engineer Mode settings that don’t open even through hidden settings, there is a method using Android Debug Bridge (ADB). This method requires connecting the smartphone to the computer through USB-cable and availability of the installed driver Mi USB Driver.

First, you need to activate the developer mode. → About the phone and quickly press 7 times on the item "Version" MIUI". Then in the advanced settings, turn on "Debugging by" USB". After connecting to the PC, execute a command in the terminal:

adb shell am start -n com.android.settings/.TestingSettings

This command will force a hidden test menu, and you can use the command to run a specific MediaTek engineering menu if the device's processor is part of that architecture, a method that is considered the most stable for old and new models, since it addresses directly to the Android system components without the launcher shell.

Main sections of diagnostics and testing

Once inside the CIT Menu or the engineering section, the user sees a list of all the components of the device. Each item is responsible for a specific module. For example, the Touch Panel section allows you to check for multi-touch and no dead zones. You swipe your finger across the grid, and the system records all the touches.

The Display or Color section displays on-screen images (white, black, red, green, blue) to find broken pickles or uneven backlights, which is often found in the OLED-And you can also check the proximity sensor, which often glides after the glass has been replaced.

The radio module section deserves special attention: the Engineering Mode tab can be found on the Telephony or BandMode tab, where experienced users choose their preferred LTE frequencies. Attention: improper settings can cause the phone to stop seeing the operator’s network completely.

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If the microphone test shows an error, but there is sound in the speaker, try cleaning the microphone hole with an alcohol napkin - often the problem is clogged dust.

Security and possible risks when changing settings

While useful, the engineering menu is a tool for professionals. A random change in the parameters in the sections labeled as RF (Radio Frequency) or Audio can lead to irreversible consequences. For example, resetting the calibration of the speakers will make the sound quiet and hoarse, and changing the transmitter power parameters can overheat the antenna module.

⚠️ Note: Never change the meanings in the sections related to IMEI or MAC-If you are not a qualified engineer, the loss of unique identifiers can make the device unusable for use on cellular networks.

Also be careful with reset features. Some menus have hidden "Factory Reset" or "Wipe Data" buttons that can go off instantly when you carelessly touch. Always read carefully what the button you're going to click on does. If you're logged in to the menu just to check the screen or battery, don't touch the other tabs.

If your phone is not behaving properly (sound, network, sensor) after your actions, the simplest solution is to completely reset to factory settings via the Recovery Mode menu, which will return all software settings to their original state, although personal data will be deleted.

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The engineering menu is a diagnostic tool, not a sound or battery enhancement toy, and use it only to check the components.

Frequently Asked Questions (FAQ)