Access to in-depth operating system settings is often necessary for advanced users who want to squeeze maximum performance out of their device or diagnose complex software glitches. The standard menu Settings, available to every smartphone owner, contains only basic options for everyday use, hiding the usual debugging and system diagnostic tools from view. Understanding where these control levers are hidden allows you to solve problems that seem unsolvable through a conventional interface.
In this article we will look at the various ways to enter service sections, which may differ depending on the version Android and the manufacturer's shell, be it pure Google Pixel or custom MIUI from Xiaomi. You will learn not only about standard navigation paths, but also about secret codes, as well as methods for activating hidden tabs through special actions in the interface. This guide will help you safely interact with critical device parameters.
Before you start making changes, you should be aware that incorrectly editing system files or kernel parameters can lead to unstable operation of the gadget. However, knowing the exact location of the necessary items, you will minimize risks and be able to purposefully search for a solution to your problem, be it calibrating the sensor or managing background processes.
Standard path to the main system parameters
The most obvious and safest way to get to the system menu is to use the standard application icon, which is usually a gear. In modern versions Android 12, Android 13 and newer, the structure of this menu has been significantly redesigned for user convenience, but the logic of the location of key sections remains the same. For quick access, just swipe the notification shade down and click on the settings icon in the upper right corner of the screen.
Inside the main section System or General settings information about the firmware version, security patch level and amount of free memory is hidden. This is where the items responsible for updating software over the air (OTA) and resetting the device to factory settings are located. Navigation is carried out by vertical scrolling, where groups of functions are logically separated by headings.
If you are looking for a specific function, such as managing application permissions or accessibility features, the easiest way is to use the built-in search bar at the top of the settings screen. The system instantly filters the list and highlights the desired item, saving time on manual search through nested menus. This is especially true for devices with an overloaded interface from manufacturers.
⚠️ Attention: Changing settings in the “For Developers” section without understanding their purpose may result in some applications no longer launching or the system becoming unstable.
Use Google Assistant voice search by saying “Open Bluetooth settings” to instantly go to the desired section without manual search.
It is important to note that item names may vary slightly on different devices. For example, on smartphones Samsung the section about the phone may be called “Phone Information”, while on Motorola it is integrated into the general section “About the device”. Always pay attention to the icons and the context of the function descriptions.
Activating the menu for developers
One of the most popular hidden sections is the menu for developers, which is hidden from ordinary users by default to prevent accidental breakdown of the system. To access it, you must complete a certain sequence of actions in the device information section. This process is unified for most devices based on Android, regardless of the brand.
You will need to go to the section Settings → About phone (or Phone information). Here you need to find the line “Build Number”. On some shells, such as MIUI or ColorOS, this line may be located inside the “MIUI Version” or “Firmware Version” submenu. After finding the desired line, you should quickly click on it 7 times in a row.
- 🔓 After the seventh click, a pop-up message will appear saying that you have become a developer.
- ⚙️ In the main settings menu, usually in the “System” or “Advanced” section, a new item “For Developers” will appear.
- 🛠️ Inside this menu, animation settings, a limit on background processes and USB debugging are available.
- 📡 Here you can also enable the display of screen refresh rate and touches.
Entering this menu gives access to tools such as USB debugging, which is necessary for installing applications via a computer or using advanced utilities like ADB. Also here you can force dark theme for applications that do not support it, or change the font size in the system interface beyond the standard limits.
It is worth remembering that activating this mode does not automatically change the way the phone works until you start changing the settings yourself. However, if you have enabled USB debugging, be careful when connecting the device to unfamiliar computers, as this may give access to your data.
Engineering menu and service codes
In addition to the graphical interface, the operating system Android there are hidden sections that are accessed through a set of special USSD codes in Phone application. These codes open the so-called engineering menu, designed for testing equipment and diagnosing telecom operator networks. The interface here is utilitarian and often looks archaic compared to the main shell.
The most common code for entering the extended test menu is ##4636##. After entering the last digit, the menu should open automatically, without having to press the call button. In this section, the “Phone Information”, “Usage Statistics” and “Wi-Fi Information” tabs are usually available. Here you can forcefully switch network types, for example, force the phone to work only in LTE or NR (5G).
#0# mode - Hardware test (screen, sensor, vibration)Other popular codes depend on the manufacturer of the processor or the smartphone itself. For example, on devices with chips MediaTek the code ##3646633##often runs, opening a deep engineering menu with audio and radio module settings. Devices Samsung have their own set of secrets, such as #0# to test the display or *#1234# to check the firmware version.
| Code | Function | Compatibility |
|---|---|---|
*#06# |
Display device IMEI | All Android |
##4636## |
Test and information menu | Pure Android, Pixel |
#0# |
Service test of equipment | Samsung |
##34971539## |
Camera information | Many brands |
⚠️ Attention: Do not change the settings in the engineering menu if you do not know exactly what a particular parameter is responsible for. Resetting the calibration of the antenna or sensor may require a visit to the service center.
It should be taken into account that on many modern smartphones, manufacturers block access to these codes through the standard “Phone” application. In such cases, you may need to install third-party launchers or utilities that emulate dialing in order to activate hidden service pages.
Why don’t codes work on new Androids?
Starting with Android 10 and higher, Google has tightened security policies, prohibiting applications and system dialers from automatically opening hidden activities using USSD codes without explicit user confirmation or special privileges.
Hidden settings through activity shortcuts
There is another level of access to system settings that is often overlooked - these are direct shortcuts to internal system activities. E Android each settings screen has its own unique identifier, and knowing it, you can create a direct link to the desired section, bypassing long menu chains. For this, special activity launcher applications or widgets are used.
For example, if you need to quickly get to the permissions management menu for a specific application, you can create a shortcut that leads directly to the page com.android.settings.ApplicationSettings. This is especially useful for automating processes or creating personalized dashboards on your desktop. These methods do not require root access, but do require installation of supporting software from the app store.
Using such shortcuts can save time if you frequently switch between specific settings, such as managing notifications or setting up access points. This turns a complex multi-level interface into a flat structure, where all the necessary tools are in one click.
- 🚀 Allows you to create widgets for instant access to deep menus.
- 🔍 Gives access to settings pages that have been removed from the visible menu in the new OS version.
- 📱 Useful for creating automation scripts in applications like Tasker.
However, you should be prepared for the fact that activity identifiers may change from version to version. What worked on Android 11may cause an error or open a blank page on Android 14. Therefore, this method is more suitable for advanced users who are ready to experiment with finding current paths.
Direct activity shortcuts are a powerful customization tool that allows you to bypass the limitations of the standard interface and speed up access to frequently used functions.
Access features on different shells
The world Android is extremely fragmented, and each major manufacturer makes its own adjustments to the location of system settings. Understanding these differences is critical, as instructions for a clean device may not be helpful to device owners. Shells not only change the design, but often move or rename entire sections. Android may not be useful for device owners Xiaomi, Samsung or Huawei. Shells not only change designs, but often move or rename entire sections.
On devices Samsung with a shell One UI many advanced settings are placed in a separate application “Good Lock” or its modules, which must be downloaded separately from the Galaxy Store. The standard menu here is simplified as much as possible for the mass user, and engineering functions are often hidden deeper or accessible only through service codes specific to the region.
In the case of Xiaomi shell MIUI (or new HyperOS), the situation is complicated by the presence of two modes: for ordinary users and developers. In addition, some features available in the global version may be cut out in the Chinese firmware, and vice versa. Finding settings here often requires turning on additional toggle switches in the Advanced Settings menu.
Devices Google Pixel provide the purest experience, where system settings are logical and predictable. However, even here, Google periodically changes the menu structure with the release of major updates, moving, for example, navigation gesture settings or battery options to new subsections. Always check that the path is up to date when updating the system.
⚠️ Attention: On smartphones of Chinese brands purchased not for your region, some system settings may be blocked or not work correctly due to differences in communication frequencies and software restrictions.
☑️ Search for settings on custom firmware
If you cannot find the desired option in the usual place, try using the “Show system processes” function in the developer settings. This sometimes unlocks the display of hidden items in the main menus that were hidden by the manufacturer to simplify the interface.
Security and restoration of settings
Working with system settings is inevitably associated with the risk of compromising the stability of the device. Before you make changes to the system registry, change kernel parameters, or enable hidden functions, you need to take care of the return point. This rule is fundamental for any enthusiast experimenting with smartphone software.
The most reliable way to protect yourself is to create a complete backup of your data and settings before starting any manipulations. Built-in tools Google allow you to save the list of applications, Wi-Fi passwords and some system preferences to the cloud. However, for a complete backup of system partitions, superuser rights and specialized software are often required, such as Titanium Backup or Swift Backup.
If, after changing the settings, the phone begins to work incorrectly, freezes or reboots, the first thing you should try is to reset the settings to factory settings. This function is usually available even in Recovery Mode, which can be accessed by a combination of physical buttons when the device is turned off. This will return the software to its original state, deleting all user data.
Remember that some changes, such as unlocking the Bootloader, may cause protection to work Knox on devices Samsung or void the warranty. Such actions are irreversible at the software level and require physical replacement of components to completely restore the device to its original state.
Where can you find the build number on Android 13 and newer?
On new versions of Android, the path remains classic: Settings → About phone. However, if the item is hidden, try going to Settings → System → About phone. In some cases (for example, on tablets) it may be located in the “System Information” section.
Is it possible to delete the developer menu after activation?
Yes, this is possible. To do this, go to Settings → Applications → Find the Settings application → Storage → Clear data. This will reset all menu settings, including the hidden developer menu, but will also return all other system settings to the “as after purchase” form.
Why does the code ##4636## not open the menu?
On many modern smartphones (especially Xiaomi, Honor, Huawei), access to this code is blocked by the manufacturer in the standard dialer. Try installing a third-party application like “Force LTE Only” or “Activity Launcher” from the Play Market to access these functions through a shortcut.
Is it dangerous to enable USB debugging?
The function itself is safe, but it opens the port to external control. The danger only arises when you connect your phone to other people's or public charging stations and computers, where attackers can try to access your data or install malware.
How to return the screen settings to default?
Go to Settings → Display → Font and display size. There's usually a "Default" button or an option to reset the sliders to the center position. If the interface is severely distorted, a complete reset of the settings in the recovery menu will help.