Xiaomi Engineering Menu: How to Open and What to Configure

The hidden engineering menu on Xiaomi, Redmi and POCO smartphones is a powerful tool for diagnosing, testing hardware components, and fine-tuning the device. It contains parameters not available in the standard MIUI interface, but it requires knowledge of special commands or codes. In this article, you will learn how to safely log into the engineering menu, what functions are hidden there, and what risks are associated with incorrect use of these settings.

It's important to understand that the engineering menu is for professionals and developers, and some changes can lead to unstable phone performance, loss of warranty, or even complete failure, so it's recommended that you back up your data and weigh the need for such actions before experimenting.

What is an engineering menu on Xiaomi and why it is necessary

An engineering menu (or Engineer Mode) is a service firmware section that allows you to:

• 🔧 Test hardware components: screen, speakers, microphone, sensors, battery.
• 📡 Set up network parameters (4G/5G, Wi-Fi, Bluetooth bypass operator restrictions.
• 🔋 Check the actual state of the battery, including the number of charging cycles and wear.
• 🎛️ Calibrate sensors (gyroscope, accelerometer, compass) for accuracy in gaming and navigation.

For example, through the engineering menu you can manually switch ranges. LTE, If the smartphone is not catching the network in your area, or calibrate AMOLED-screen if the colors are not displayed correctly, but most functions are designed for service centers and can be dangerous if used illiterately.

How to enter the engineering menu on Xiaomi

There are several methods of activating hidden menus, and their availability depends on the model of the smartphone and the version of MIUI.

Method 1: Secret USSD-code

The easiest way is to enter special combinations in the Phone app. For most Xiaomi devices, the following codes are suitable:

• 📱 ##4636## - Main Engineering Menu (testing and information).
• 🔋 ##6484## - Test of hardware components (MTK-chip).
• 📡 ##4634## - Information about SIM-map.

If nothing happens after you enter the code, your model uses a different activation method or the manufacturer has blocked it in the latest versions of MIUI.

Method 2: ADB (for advanced users)

If USSD-codes do not work, you can use the Android debugging bridge (ADB). For that:

1. Turn on Developer Mode (7 times click on the MIUI version in Settings → About Phone).
2. Activate Debugging by USB in Settings → Additional → For developers.
3. Connect your smartphone to your PC and execute the command: adb shell am start -n com.android.settings/.DevelopmentSettings

After that, the Engineering menu or CIT (for devices on Qualcomm processors) will appear in the settings.

Method 3: Special annexes

Google Play has utilities like MTK Engineering Mode or Qualcomm EngineerMode that make it easier to access hidden features.

⚠️ Note: Many of these apps require root rights or contain malicious code. Install them only from trusted sources and check reviews.

What Xiaomi models support the engineering menu

The availability of the engineering menu depends on the processor and version of MIUI. Below is a compatibility table for popular devices:

On the new flagships (Xiaomi) 13/14 Manufacturer often blocks USSD-codes, leaving only ADB-If your model is not listed in the table, try universal codes or check the information in forums like 4PDA.

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Before using the engineering menu, check the MIUI version in the settings. On beta firmware (e.g. MIUI China ROM), some features may not be available.

What can be set up in the engineering menu

The menu functionality varies depending on the model, but the most useful sections are:

1. Testing of hardware components

In the Hardware Testing section, you can check:

• 🔊 Speakers and microphone – sound reproduction and voice recording.
• 📸 Cameras – test of all modules (wide-angle, telephoto, macro).
• 🔄 Gyroscope/accelerometer – calibration for games and AR-applications.
• 🔋 Battery - real capacity, voltage, temperature.

Network and communication configuration

Network Settings is available:

• 📶 Manual selection of ranges LTE/5G (weak-signal).
• 🔄 Switching between 2G/3G/4G (If the automatic system is not working properly).
• 📡 Wi-Fi speed test with detailed statistics.

Calibration of sensors and screen

If the smartphone incorrectly detects gestures or colors on the screen are distorted, you can:

• 🎨 Calibrate. AMOLED/OLED-matrix (to eliminate color shifts).
• 👆 Check the proximity sensor (if the screen does not go out during the call).
• 🔄 Reset the accelerometer settings (if the games do not respond to tilts).

Risks and Warnings When Using the Engineering Menu

Despite its usefulness, the engineering menu has several dangers:

⚠️ Warning: Changing the parameters of Radio Band or NV-items without knowing the technical details can lead to loss of the radio. IMEI, That would make the phone unusable for calls. IMEI requires specialized equipment.

Other risks:

• 🚫 Loss of warranty: if the service center finds traces of interference in the engineering menu, repair warranty may refuse.
• 🔥 Overheating or battery discharge: Incorrect test settings can cause increased power consumption.
• 📵 Network Blocking: Incorrect band configuration will result in no mobile internet.

If you are not sure about your actions, it is better to contact the Xiaomi service center or use official diagnostic tools, for example, the Mi Diagnostics application.

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The engineering menu is not a magic wand for overclocking or repairing; most problems are solved through standard settings or firmware updates.

Frequent Mistakes and How to Avoid Them

Users often face the following problems:

1. Codes are down.

If you enter #4636##, nothing happens:

• 🔄 Check if your carrier is blocking the code (try another one). SIM-card).
• 📱 Update. MIUI Up to the latest version (sometimes codes are returned in new firmware).
• 💻 Use it. ADB-method (see section above).

2.The menu opens but features are not available

On some models (such as the Xiaomi 13T), the engineering menus may open, but most items will be inactive, which means that the manufacturer has restricted access to them at the software level.

• 🔓 Getting root rights (risky for beginners).
• 🔧 Use of specialized utilities (e.g, QPST for Qualcomm).

3 After the changes, mobile Internet disappeared

If you have edited your network settings and lost communication:

1. Reboot your smartphone.
2. Return to the engineering menu and reset the Network settings to the factory.
3. If nothing helps, reset the network to Settings. → SIM-maps and mobile networks → Resetting network settings.

FAQ: Answers to popular questions