How to go to the engineering menu Xiaomi Redmi 7: secret codes and settings

Xiaomi Redmi 7 is a popular smartphone with extensive customization options, but not all features are available in the standard interface. For experienced users who want to optimize the device or diagnose hardware problems, there is an engineering menu — a hidden section with advanced settings. However, logging into it requires knowledge of special codes and caution: wrong actions can lead to malfunctions of the phone.

In this article, we will take a look at how to securely access the engineering menu on Redmi 7, what codes are used to do so, and what you can customize inside, and learn about the risks and precautions to avoid irreversible consequences. This information is relevant for all Redmi 7 versions (including Redmi). 7A), base-worker MIUI Android 9 Pie.

What is an Engineering Menu and Why You Need It

The Engineering Menu (or Engineer Mode) is a hidden part of the operating system designed to test hardware components, calibrate sensors, and diagnose malfunctions. Manufacturers like Xiaomi use it during the production and maintenance phase. It is closed to ordinary users, but can be activated with special commands.

Here are the main tasks that are solved through the engineering menu:

• 🔧 Testing of hardware modules: checking the operation of the display, camera, speakers, microphone, accelerometer and other sensors.
• 📡 Network setting: changing mobile settings (e.g. switching between standards) 2G/3G/4G), signal-testing.
• 🔋 Battery calibration: resetting battery statistics to correctly display charge level.
• 🎛️ Change of system parameters: adjusting the sensitivity of sensors, adjusting the color rendering of the screen.

It is important to understand that the engineering menu is not designed for everyday use, most of its functions require deep technical knowledge, and incorrect settings can lead to loss of warranty, malfunction of the phone or even its “bricking” (complete inoperability).

How to log into the engineering menu on Xiaomi Redmi 7

There are several methods to access hidden settings, and we'll look at the most reliable and proven ways that work on Redmi 7 with the original firmware. MIUI. Make sure your phone is at least 50% charged before you start – this minimizes the risk of crashes.

Method 1: Use of the USSD-code

The easiest way is to enter special codes in the Phone app. Open the dial keyboard and type one of the following options:

• 📱 ##4636## - Main Engineering Menu (Testing and Phone Information).
• 🔢 ##36446337## - Menu for checking hardware components (MTK Engineer Mode, runs on MediaTek processors).
• 📶 ##4636## → Phone information → Network settings – for manual selection of communication standard.

If nothing happens after entering the code, check:

• ✅ Setting correctness (symbols * and # must be in place).
• ✅ Absence of spaces or unnecessary symbols.
• ✅ Version of firmware: on some custom assemblies MIUI codes may be disabled.

Method 2: Through the Testing app (for MediaTek-based firmware)

On some versions of Redmi 7 (especially with Snapdragon 632), standard codes may not work. MTK Engineering Mode or Shortcut Master:

1. Download the app from Google Play (make sure it’s the official version).
2. Run it and grant superuser rights (if required).
3. Select the Engineer Mode option (MTK) or Secret Codes.
4. Follow the instructions on the screen to access hidden settings.

⚠️ Note: Third-party apps may contain malicious code. Check reviews and ratings in the store before installing, and use antivirus.

Method 3: Through ADB (for advanced users)

If you are familiar with Android Debug Bridge (ADB), You can use the command to run the engineering menu:

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

This method requires:

• 🖥️ Installed drivers ADB PC-only.
• 🔌 Included debugging by USB developer-setting.
• 📱 Connected phone to computer via original cable.

After you execute the command, the phone will have an engineering menu, which is suitable for advanced users, because it requires a command line.

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If the engineering menu doesn't open, try restarting your phone and re-entering the code. Sometimes resetting your network settings to Settings helps. → System system → Resetting settings.

What to customize in the Redmi 7 Engineering Menu

Once you log in, you'll see a few tabs with technical information and settings, and let's look at the most useful sections that can be used to diagnose or optimize your phone.

One of the most popular sections is Telephony, and you can:

• 📶 Manually select a network standard (e.g., force-enabled) 4G, If the phone only catches 3G).
• 🔄 Switch between modes GSM only, WCDMA only LTE only.
• 📡 View information about the cell, signal level and neighboring base stations.

Battery is available in the battery calibration section. 7 switch off 20-30% Charge or shows an incorrect level, follow the following steps:

1. Go to Battery → Battery Calibration.
2. Press Calibrate and wait for the process to be completed.
3. Reboot the phone.

⚠️ Attention: Calibrating the battery through the engineering menu does not replace the physical replacement of the battery.If the phone discharges quickly, the problem may be in battery wear, not software settings.

Risks and precautions

Working with an engineering menu is always a trade-off between opportunities and potential challenges, and even minor changes can cause a phone to run in an unstable way.

• 🚨 Loss of warranty: Any changes to hidden settings may cause denial of warranty service.
• 📵 Network failure: Incorrect settings in the Telephony partition can lead to a lack of signal.
• 🔋 Battery problems: Incorrect calibration can speed up battery wear.
• 🔄 Cyclical reboot: Changes in system parameters sometimes cause a “bootloop” (endless reboot).

To minimize the risks, follow these rules:

1. Always back up your data before entering the engineering menu (use Settings). → System system → Backup).
2. Do not change the parameters, the purpose of which you do not know.
3. If you are not sure about your actions, take a picture of your current settings before changing them.
4. Use the engineering menu only when necessary to diagnose or fix specific problems.

If the phone is not working properly after the change:

• 🔄 Try restarting the device.
• 🔧 Reset settings through the standard menu (this will not delete user data, but will return system settings to factory settings).
• 🛠️ In extreme cases, resort to a full reset (hard reset) through Recovery Mode.

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If you are not an experienced user, avoid changes to Hardware and RF — They directly affect the hardware and can make the phone fail.

Frequent mistakes and their solutions

When you're working with an engineering menu, you often have a problem, and let's look at the most common ones and how to fix them.

Mistake 1: The code is not working

If, after input, USSD-code nothing happens:

• 📱 Check if your mobile operator is blocking your code (some providers are restricting access to engineering codes).
• 🔄 Try entering the code through another dialing app (like Google Phone).
• 🔧 Make sure that the original firmware is installed on the phone. MIUI (Custom assemblies often remove support for engineering codes).

Mistake 2: The phone has stopped catching the network

If the signal is lost after changes to the Telephony section:

1. Return to Band Mode and select Auto.
2. Check if Airplane Mode is disabled.
3. Reset your network settings in the standard menu.

Error 3: The battery discharges quickly after calibration

If after calibration the battery began to sit down faster:

• 🔋 Complete a full discharge-charging cycle (discharge the phone to 0%, then charge to 100% without interruption).
• 📊 Check the consumption statistics in Settings → Battery – maybe an app has started to use more energy.
• 🔄 If the problem persists, return the battery settings to factory settings (in the engineering menu or through resetting).

Error 4: Phones will not turn on after changes

If Redmi 7 doesn’t launch or is stuck on the logo MI:

1. 🔌 Connect your phone to the charger and wait. 10-15 minute.
2. 🔄 Try to enter the Recovery Mode (clip the power supply). + Volume up when the phone is off).
3. 📱 Choose Wipe. data/factory Reset (this will delete all data, but return the phone to working condition).

If none of these methods worked, you may need to flash through Fastboot or contact a service center.

Alternatives to the Engineering Menu

If you need to test hardware components or set up a network, but you don’t want to take the risk of using an engineering menu, consider alternative ways to:

1. Built-in tests in MIUI

Xiaomi provides standard diagnostic tools for:

• 📱 Go to Settings. → The phone. → All specifications → Hardware test.
• 🔧 Here you can check the operation of the display, camera, speakers and other modules without risk to the system.

2. Third-party diagnostic applications

Google Play has a number of tools that offer secure access to technical information:

• 📊 CPU-Z — Shows detailed information about the processor, memory and sensors.
• 📡 Network Signal Info – Analyzes the signal level of the mobile network.
• 🔋 AccuBattery – monitors the status of the battery and offers recommendations for its preservation.

3. Developer modes

Many of the functions of the engineering menu are duplicated in the developer settings, to activate them:

1. Go to Settings. → The phone.
2. Click 7 times on the MIUI version until you get a message: You are a developer!
3. Back to Settings → Additionally. → For developers.

Here you can:

• 🔄 Enable Debugging on USB.
• 📡 Change the preferred type of network.
• 🎛️ Customize window animation and other visual effects.

The advantage of these methods is that they do not require deep technical knowledge and do not pose risks to the stability of the system.

Conclusion: Should you use the engineering menu?

The Xiaomi Redmi 7 Engineering Menu is a powerful tool that unlocks the hidden capabilities of the phone, but it's primarily for professionals and power users, and if you're unsure of what you're doing or don't have a clear understanding of why you need these settings, you better give up experimentation.

For most tasks (sensor testing, network setup, battery testing) standard tools are sufficient. MIUI They provide the same information, but without the risk of damaging the system.

If you decide to use the engineering menu, follow our recommendations:

• 📌 Always make a backup copy.
• 🔍 Change only the parameters you understand.
• 🛠️ At the first sign of unstable work, return the settings to the factory.

Remember, the wrong actions in the engineering menu can lead to loss of warranty and irreversible breakdowns. If your goal is simply to optimize the operation of the phone, start with safer methods: update firmware, clear cache or reset settings through the standard menu.

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The engineering menu is not a magic wand for all problems, and in 90% of Redmi 7 malfunctions, they are fixed by standard means: software updates, resets, or replacement of faulty components.

FAQ: Frequent questions about the Xiaomi Redmi engineering menu 7