Redmi smartphones have long proven to be reliable devices with extensive customization. Despite their age, the Redmi Note 7 remains popular due to its excellent value for money and the presence of hidden system functions available to the average user. One of these features is an engineering menu that allows you to conduct deep diagnostics, test hardware components and change hidden system parameters.
This section is not only necessary for breakdowns, but also for fine-tuning the device to suit your needs. The engineering menu provides access to sensor, screen, speakers, communication modules and GPS tests, making it an indispensable tool for advanced users. In this article, we will discuss in detail all the ways of logging in, possible problems and methods of solving them.
It's worth noting right away that tampering with system settings requires caution. Changing the settings incorrectly can cause the device to malfunction. However, if you follow the instructions, the risk is minimal. Let's look at how to safely activate hidden features on your gadget.
What is an Engineering Menu and Why You Need It
The Engineering Mode is a special diagnostic interface built into the Android operating system and the MIUI shell, originally designed for engineers in manufacturing plants to quickly check the performance of components immediately after assembly, but over time, the functionality has become available to end users, allowing self-diagnosis.
Xiaomi Redmi Note 7 owners can use this section to check IMEI, It's the calibration of the proximity sensor, the touchscreen testing, and the volume settings of the speakers, and it's often where you solve problems with quiet sound in conversation or incorrect work. GPS-It's a powerful tool in skilled hands.
It's important to understand the difference between a developer menu and an engineering menu: the former is designed to debug apps and work with ADB, while the latter works at a lower level, interacting directly with the hardware of the phone, which is why access to it is often hidden by default.
⚠️ Note: Changing the parameters unknown to you in the Telephony or Connectivity section may lead to loss of network signal or unstable operation of communication modules.
Menu functionality varies by firmware version and region. Global MIUI versions may miss or rename some items compared to Chinese builds. However, a basic set of tests is usually saved on all devices.
Preparation of the smartphone before the start of work
Before you start activating hidden functions, you need to make sure that the device is ready for diagnosis. First of all, check the battery power: for complete tests, especially screen and communication, the charge level should be at least 30-40%, this will eliminate a sudden shutdown at a critical moment.
It is also recommended to back up important data. While logging in to the menu is safe, accidentally changing the settings may require resetting the device to factory settings. Save contacts and photos to the Mi Cloud cloud or to your computer.
If you are planning to test the communication module, make sure that the slot is installed SIM-Without an active SIM card, call and data tests will be unavailable or show an error.
There are several proven methods of activating the diagnostic mode. The simplest and most common is the use of the diagnostic mode. USSD-It's a standard dialing interface, and it works on most firmware versions. MIUI without the need to install additional.
Open the Phone app and dial ##64663##. If the code is entered correctly, the menu should open instantly, without having to press the call button, and a list of test names in English will appear on the screen.
In some cases, especially on newer versions of the shell, the standard code can be blocked by the operator or manufacturer, then you can try an alternative combination ##4636##, which opens the test menu of information about the phone, although its functionality is somewhat limited compared to the main engineering menu.
What if the code doesn't work?
If the code ##64663## doesn't work, your firmware version may block that request. Try entering the code slowly, making sure the autocorrect number didn't work. You can also try entering the code in the Phone app through Google's dialer if the standard one is replaced. In rare cases, you need to install a special activator application from the Play Market that emulates the input of this code by system means.> Another method involves using an engineering calculator, which is sometimes found in older versions of MIUI. You need to find the Calculator application, enter the Calculator, the standard one is replaced. (inator is often used on a secret code from the 1256 milator, or a standard model of the Redmi, but this one works on the standard standard on 1234%, on modern systems.) Use of the Engineer Mode application MTK For activation, since Redmi Note 7 built on the basis of the Qualcomm Snapdragon processor, not MediaTek, many users mistakenly try to use applications for the Internet. MTK. However, there are universal utilities that can help activate hidden menus through the ADB-One effective way to do this is to use Activity Launcher or similar tools that allow you to run hidden activity in your system, and find an activity called com.android.engineeringmode or something similar on the list, and run it. It's a direct route to the menu, bypassing the codes. If you're a confident user, you can use a computer and a utility. ADB. Connect the phone in debugging mode USB Enter the command: adb shell am start -n com.android.engineeringmode/.EngineeringMode. This method guarantees entry if the component is not removed from the firmware. ⚠️ Note: Install applications from unknown sources (APK-Files are a security risk. Only download utilities from trusted stores, such as Google Play, to avoid the introduction of malware. Using third-party apps is a crutch that is rarely needed. 95% of the time, the standard is enough. USSD-You can only use software installation if you've exhausted the standard methods. You'll see a list of tests after you've successfully logged in, each of which is responsible for checking a particular node on your smartphone. Knowing the basic features will help you to effectively use the engineering menu for diagnosis. 📱 Display: Checks broken pixels, color production and touchscreen response to touch, reveals dead zones of the sensor. 🔊 Audio (Sound): Testing the main speaker, the speaker and the microphone, and you can check the noise reduction and maximum volume. 📡 Connectivity: Diagnostics of Wi-Fi, Bluetooth and GPS. It allows you to see the real signal strength and data transfer rate in real time. 📸 Camera: Check focus, flash and switch between lenses without running the main camera app. 🔋 Battery: Detailed information about battery status, temperature and charging cycles, which is useful for assessing wear, and the Touchpanel test is particularly noteworthy, which paints the screen in a certain color and requires you to swipe your finger over the entire surface. If the line is interrupted or shaking in a certain place, it indicates a problem with the digitizer or protective glass. In the Receiver section, you can force the speaker to turn on at maximum power. This is useful if you notice that the interlocutor has become worse than you hear, and you need to understand whether it is in the dynamics or in the software. Calibration and elimination (Frequent problems) One of the most popular features for owners of the Redmi Note 7 is the calibration of the proximity sensor. It is through the engineering menu (or a special calibration menu called by the code # #6484# in some versions) that the screen goes out during the call or does not go out at all, then the sensor is successfully placed on the top of the screen. Another common problem is quiet sound. In the engineering menu, you can check if the volume is software low. However, be careful: forced increase (gain) can lead to wheezing of the speaker or its burnout. Component of the test Name Expected result Possible error Screen LCD / Touch Even color, accurate touching of the Dead Zones, stripes Speaker / Recer Clean sound without wheezing Silence, crackling SIM / Network Signal Stable Network Search, IMEI Menue Possssible error The LCD / Toucher'suppering system will not require a response to the Vibrator, if the error of the application of the Vibrator, the error is not required. In most tests, you just press back or home to exit the current test. To close the engineering menu completely, just turn off the app or press the task closure button. If you just look at the settings and exit, nothing changes. If the phone is “hang” during a test (for example, a vibration test or a screen), press the power button on the phone. 10-15 It's a normal situation and won't hurt the device. ⚠️ Warning: Never try to change. IMEI-This is illegal in most countries and can result in carriers locking your smartphone permanently. Regular diagnosis with built-in tools will help extend the life of your Redmi Note 7 And you can see the hardware problems that are starting to get worse, and it's safe to go to the engineering menu on the Redmi Note. 7? Yes, by itself, logging in and viewing the menu is completely safe, and the only risk is if you change the settings you don't know about in the radio or voltage sections, and if you just run the tests (press Start and see the result), nothing breaks. Why is the #64663## code not working? This can happen for several reasons: custom firmware is installed, where the dialer is changed; the code is blocked by the carrier; or a non-standard phone application is used. Try entering code through Google's standard dialer or using Activity Launcher. Can you improve sound through an engineering menu? Theoretically, you can change the equalizer or (amplification) settings in the audio section, but on modern versions. MIUI These settings are often hidden or blocked, and if you change them in a clumsy way, you can distort the sound. It is better to use third-party applications to amplify the sound or adjust the equalizer in safe mode. Are the settings reset after rebooting? Settings changed in the engineering menu (for example, calibration of the sensor) are usually stored in the device memory and are not reset after rebooting. However, resetting to the factory settings (Hard Reset) will return all parameters to the original state, and the calibration will have to be done again.