How to turn the screen on Xiaomi Redmi Note 8 Pro: 4 proven ways

What is “wire” and why you need it on the Redmi Note 8 Pro

The term “engineering mode” among Xiaomi users refers to a hidden engineering menu that allows you to test the hardware components of a smartphone, from the screen and camera to communication modules. On the Redmi Note 8 Pro (begonia model), this menu is especially useful for diagnosing problems with the Helio G90T, NFC or sensors, which often “glue” after MIUI updates.

Unlike standard settings, the width gives access to low-level parameters: for example, here you can check the calibration of the accelerometer, test the vibration engine at different frequencies, or even enable hidden functions of the NFC module (if you have one in your modification). However, it is important to understand that not all options in the engineering menu are safe. Some tests (for example, Auto Test → Single Test → LCD) can lead to artifacts on the screen if interrupted incorrectly.

On the Redmi Note 8 Pro, there are two types of width:

• 🔧 Hardware Testing – basic hardware checker menu (available via codes).
• 🛠️ Engineer Mode (MTK) — Extended menu for Mediatek chips (requires root rights or special applications).

Method 1: Standard code for logging into the engineering menu

The easiest way is to use service USSD-The Redmi Note 8 Pro has a combination that is universal for all smartphones on Mediatek Helio. G90T:

1. Open the phone app.
2. Enter the code ##4636##
3. Press the call button (as if you were calling).

After that, the “Testing” menu will open with tabs:

• 📱 Telephone information (network data, IMEI, signal).
• 🔋 Battery statistics (temperature, real-time charge level).
• 📡 Usage statistics (app activity, traffic).

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If the code didn’t work, try an alternative: ##36446337## – it opens the EngineerMode (MTK) extended menu on some firmware.

⚠️ Warning: Do not change the settings in the Radio Information tab unless you understand their meaning. Incorrect settings can lead to loss of network or overheating of the module. 4G.

Method 2: MTK Engineer Mode (for advanced tests)

If standard codes don't provide the right options, use MediaTek's official MTK Engineer Mode app, which allows you to run tests that are not available via the USSD:

Download. APK with APKCombo (version 6.0)+)|Allow installation from unknown sources in Settings → Annexes → Special access|Check the version. MIUI (Android 10+ limitations may be)|Restart the phone after installation-->

After installation:

1. Launch the app and select “MTK Settings”.
2. Go to the Hardware Testing → Single Test section.
3. Select a component to test (e.g. Touch Panel to check the touchscreen).

This menu can be used:

• 🎵 Test speakers at different frequencies (Audio option) → Normal Mode).
• 📸 Check the cameras (including infrared if you have one in your modification).
• 🔄 Start a stress test of the processor (option) CPU Stress Test – Can Discharge Your Battery in 10 Minutes!).

Method 3: Hidden menu via MIUI settings (no codes)

MIUI 12-14 firmware for the Redmi Note 8 Pro has a hidden path to the engineering menu through standard settings, which works without installing third-party apps:

1. Open the Settings. → The phone.
2. Click 5 times in a row on the MIUI version (you will be notified “You are a developer”).
3. Return to the main settings menu and select Additional → For developers.
4. Activate the “OEM Unlock” and “USB Debugging” switches.
5. Now in Settings → System → Advanced settings will appear item “Engineering menu”.

This menu is available:

• 🔋 Battery test (reveals real capacity in mAh, not percentages).
• 🌡️ Temperature sensors (CPU, battery, charger).
• 📶 Network monitoring (Wi-Fi signal, LTE, GPS real-time).

⚠️ Note: If the mobile Internet is lost after activating the engineering menu through the settings, check the Set Preferred Network Type option in the Mobile Network section. 2G only.

Method 4: ADB-Teams for experienced users

If previous methods didn’t work, you can turn on the screen via Android Debug Bridge (ADB).This requires a PC and minimal command line skills.

Steps:

1. Install ADB Tools on your computer.
2. Connect the Redmi Note 8 Pro via USB and allow debugging (notification will appear on the phone).
3. Open the command line (Windows) or terminal (Mac/Linux) and type in: adb shell am start -n com.android.settings/.DevelopmentSettings
4. Then run the command to run the engineering menu: adb shell am start -n com.miui.engineermode/.EngineerMode

If the commands don’t work, try an alternative:

adb shell am start -a android.intent.action.MAIN -n com.mediatek.engineermode/.EngineerMode

You can also unlock hidden options via ADB, such as:

• 📡 Enable network diagnostics 5G (Yes, even if you have a Redmi Note. 8 Pro doesn't support 5G officially: adb shell setprop persist.radio.force_on true
• 🔊 Activate advanced audio settings (for audiophiles): adb shell settings put global audio_effects_enabled 1

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ADB-The wrong command (e.g., fastboot oem unlock) can result in a complete reset of the phone or lock the bootloader.

What to break in the engineering menu (and how to avoid it)

On the Redmi Note 8 Pro, it is especially dangerous to change the parameters in the BandMode (network frequency settings) and RF Tool (radio module) sections. Incorrect values can lead to a “brick” of the communication module – the phone will stop catching the network, and you will only recover it through the firmware in the service center.

Top.-5 Dangerous Options and Their Consequences:

🔹 Security rule: Before changing any setting in width, take a picture of your current settings (especially in the Telephony and Connectivity sections) to help you get it back if something goes wrong.

Frequent questions about the width on the Redmi Note 8 Pro