Chinese smartphone owners often wonder where Xiaomi Redmi hides some of the features that are legendary on the Internet.The shell of MIUI, and now HyperOS, is vastly different from standard Android, offering users a host of features hidden from the eyes of the average user.
This article will guide you through Xiaomi Redmi’s maze of system settings, how to get to the engineering menu, where to look for hidden iron tests, and what combinations of codes work on modern firmware versions, and how to activate additional tools for developers and diagnose problems without going to the service center.
Many users are unaware that their device has powerful diagnostic potential, and using hidden partitions correctly not only allows them to test the performance of sensors, but also to access information that is usually hidden.
Access to the engineering menu and CIT-test
The most important part of the diagnosis is the so-called CIT-This is where the tools to check all the components of a smartphone, from the screen and touch screen to the communication modules and the gyroscope, are accessed through the standard Phone app, typing in a special code.
Enter the combination ##6484## or ##4636## in the dialer. Immediately after entering the last digit or character, the system test menu will open. If the code does not work, your version of the MIUI shell may restrict this access and require third-party caller apps or activation via ADB.
⚠️ Warning: Be extremely careful in the engineering menu. Changing the settings in the sections marked as "Write" or "Set" can lead to incorrect operation of communication modules or complete loss of network signal.
Inside this section, you'll find a list of all the tests available. For example, the TouchPanel test allows you to test the accuracy of the screen response by drawing lines across the entire surface of the display. The Receiver and Speaker test will help you determine whether the speaker is working, and the Vibrator will check the vibration motor.
- 📱 Version: Shows the current firmware version and basic model information.
- 📡 SIM Card Test: Status and Registration Check SIM-map.
- 🔋 Battery: Detailed information about battery status and charging cycles.
- 📸 Camera: Launching the camera in test mode to check focus and color reproduction.
What if the code doesn't work?
Hidden opportunities for developers
Another place where powerful tools are hidden in Xiaomi Redmi is the developer section, which is hidden by default so that inexperienced users don't accidentally change critical settings, and activating this menu gives access to process management, debugging, and animation.
To unlock the partition, you need to go to Settings → About the phone. Find the line "Version." MIUI» or "Version" OS» And press it fast. 7-10 It will notify you that you have become a developer, and then a new item will appear in the main settings menu, in the "Additional" section.
You can find the animation scale setting here, changing the values from 1.0 to 0.5 visually speeds up the interface, making the system's responses more sharp, and the "Do not turn off the screen" function when charging is available here, which is convenient for using a smartphone as a desktop clock or control panel.
- 🚀 Optimization MIUI: Allows you to speed up the launch of applications by disabling background checks (on older versions).
- 🔍 Debugging by USB: Critical for connecting a smartphone to a computer for deep tuning.
- 📊 Process statistics: Shows the load on RAM in real time.
- 📍 Location fixing: Selection of protocols GPS for more precise positioning.
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Before you change the settings in the developer section, take a screenshot of the initial values, which will quickly return everything as it was if the system starts to work unstable.
Where to find error logs and usage statistics
If your Redmi is unstable, the system keeps detailed logs of all the events that occur, and this data is hidden in deep system folders, but you can access it through a special statistics menu, which is useful for advanced users who want to understand which application is eating away at the battery or causing freezes.
Enter the code ##4636## (if it is active on your model) or use the Diagnostics app (Mi Assist) and in the usage statistics section you will see a detailed breakdown by screen time, processes running and energy consumption of specific services.
Also worth noting is the section on Memory Use, where in Xiaomi Redmi, RAM management is quite aggressive, where you can see how many applications are running in the background and how many are free to do new things, and understanding these processes helps optimize the device.
| Parameter | Where to find out. | Meaning |
|---|---|---|
| Time to work. | Settings → Battery | Total screen activity time |
| Mistakes by | Settings → The phone. → Log. | List of critical system failures |
| Use of RAM | Settings → Advanced → Memory | Occupied/Free (in MB/GB) |
| Wi-Fi statistics | Engineering menu → WiFi | Signal strength and error frequency |
Analyzing this data reveals voracious applications that work in the background even after closing, often causing the battery to run out quickly and the device to heat up.
Search for hidden interface settings and themes
The visuals of Xiaomi Redmi are also full of surprises, with many users looking for settings in Xiaomi Redmi's fonts, icons and system sounds that go beyond the standard theme store, some of which are available in the Themes app, but there are also hidden system options.
In the Themes app, go to the profile (human icon) and click on the settings gear. Here you can turn on the widgets on the lock screen, change the behavior of the notification curtain and activate additional effects. Some features, such as Second Space, are also in the general system settings.
To change system fonts without installing third-party launchers, use the same "Themes" section. However, installing fonts from other devices (such as iOS), often requires obtaining superuser rights or using special font patchers.
- 🎨 Accent colors: In new versions of HyperOS, you can change the color of system icons under wallpaper.
- 🔔 Notification sounds: System sounds can be replaced with custom ones through the file manager.
- 📱 Navigation: Hiding the navigation bar or changing gestures in special features.
- 🌙 Dark theme: Set up a schedule and dimming depth for different applications.
⚠️ Warning: Installing themes and fonts from unverified sources can lead to a “bootloop” (cyclical reboot.
Diagnostics of network and communication modules
Mobile or Wi-Fi issues are a common reason to call for support, but before carrying a phone for repair, it’s worth checking the status of the communication modules through a hidden menu. Xiaomi Redmi has a dedicated section, often called “Radio Info,” to do this.
Using code ##4636## (if available) or through the developer menu, you can get into the settings of your preferred network type, where you can force the phone to LTE Only or 3G Only, which is useful in areas of uncertain reception, where the phone constantly jumps between communication standards.
It also shows neighboring cells, the signal strength in dBm, and the connection quality, and it helps you understand whether the problem is a hardware breakdown of the antenna or just a feature of the operator's coverage in your location.
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Forced network type choices (like 4G only) can significantly improve internet stability in places where signal is weak, but the phone is constantly trying to switch to 3G.
Secrets of the Security app
Xiaomi's standard Security app is not just an antivirus, it's a central hub for system management, where many useful features are hidden, and that's where memory cleaning, permission management, and hidden battery settings are located.
Open the app, click on the three dots in the top right corner, and select Settings, where you can activate Advanced Cleanup, which removes the ad cache, and set up the autorun of the apps. Autorun is a critical feature to save charge.
In the Battery section inside the security application, you can see the detailed energy consumption of each application, and there is also the Optimization feature, which closes the background processes, but be careful: too aggressive optimization can disrupt the messengers.
- 🛡️ Hidden profile: Ability to hide apps and photos in a special protected section.
- 🚫 Blocker: Set up blacklists for calls and SMS.
- ⚡ Acceleration: Forced closure of background processes for release RAM.
- 📉 Traffic: Detailed accounting of Internet traffic consumption by application.