The modern Android operating system provides users with a wide range of capabilities that go far beyond simply using pre-installed applications. For deep optimization, debugging or performing specific tasks, it is often required launching utilitiesthat are hidden from the regular interface. Understanding how to activate these tools gives you access to the device's hidden features.
Depending on your goals, the process can range from simply searching through the settings menu to using complex commands through your computer. Some utilities require obtaining root access, while others are available through standard developer mode. It is important to clearly determine which tool you need before proceeding.
This guide covers basic methods for accessing system services and third-party apps. We will look at both standard system tools and methods of interaction via ADB (Android Debug Bridge). Be careful when executing commands, as incorrect actions can lead to unstable operation of the gadget.
Searching and launching standard system utilities
Most users do not even suspect that many powerful tools are already installed on their smartphone. You don't always need third-party apps to access them. It is enough to know the correct paths in the menu or special codes. For example, the hardware test menu is often hidden behind special shortcuts.
To find standard utilities such as memory cleaning or battery management, go to Settings → Device maintenance. Basic diagnostic tools are collected here. However, deeper utilities, such as USSD codes or the engineering menu, require an input sequence in the Phone application.
The engineering menu allows you to test sensors, screen and communication modules. Entering a code like ##4636## can instantly open the phone information panel. Please note that on different models Samsung, Xiaomi or Pixel these codes may differ or be blocked by the manufacturer.
Before entering the engineering menu, take a screenshot of the current network settings, since accidentally changing parameters may lead to loss of cellular signal.
- 🔍 Type
#0#to run a display and sensor test on many devices. - 📊 Use
##4636##to view usage statistics and Wi-Fi information. - ⚙️ Find the "For Developers" section in Settings to access USB debugging.
⚠️ Attention: Changing parameters in the engineering menu (especially radio module settings) may cause the phone to malfunction. Do not change the values unless you are sure of their purpose.
Activating developer mode for advanced features
To run many diagnostic utilities and debugging tools, you must activate a hidden section in the settings. It is disabled by default to protect inexperienced users from accidental errors. The activation process is universal for most versions of Android, starting from 4.2.
Go to Settings → About phone (or “About device”). Find the Build Number item. You will need to quickly click on this item 7 times in a row. After several presses, the system will warn you about how many times you have to press before activation.
As soon as the mode is activated, a new section will appear in the main settings menu System → For Developers. This is where the keys to managing processes, debugging the interface and working with utilities via a PC are located. You can enable USB debugging, which is a critical step for further interaction with the device.
Inside this section you will find utilities for emulating additional displays, setting a limit for background processes and forcing the activation of a dark theme. Be careful: enabling some options, such as “Keep the screen on” when charging, can lead to matrix burn-in on AMOLED screens.
Using ADB to run utilities from the computer
The most powerful way to manage the system is to use Android Debug Bridge (ADB). This tool allows you to send commands from your computer directly to the smartphone shell. To work, you will need to install device drivers and the Android SDK Platform-Tools on your PC.
Connect your smartphone to your computer via a USB cable. Make sure the debugging permission notification appears on your phone screen and confirm it by tapping Allow. You can now send commands through the terminal or command line.
To run a specific application or utility, you need to know its package name. The command to run is as follows:
adb shell am start -n com.android.settings/.SettingsThis command will force open the settings. You can replace the package name with any other one installed on the system. This is especially useful if the application icon is hidden or the system is unstable. You can also run utilities through ADB with shell rights, bypassing the graphical interface.
☑️ Preparing to work with ADB
| Command | Description of action | Required access |
|---|---|---|
adb devices |
Checking the device connection | Normal |
adb shell |
Entering the phone command shell | Normal |
adb reboot |
Rebooting the device | Normal |
adb root |
Restarting the daemon with superuser rights | Root / Engineering |
Remember that command line interfaces may change depending on the Android version. What worked on Android 10 may be limited in Android 14 due to increased security policies.
Running utilities through the terminal on the device itself
If you don't have a computer handy, you can use terminal emulators directly on your smartphone. Applications like Termux or Terminal Emulator provide access to the Linux shell built into Android. This allows you to run scripts and utilities locally.
Elevated privileges will be required to run most system commands in the terminal. Enter the command su and click “Allow” in the pop-up window of the rights manager (if you have Root). After this, you will have access to the file system and system utilities.
Through the terminal you can run standard Linux utilities, such as top to monitor processes or ping to check the network. You can also write your own bash scripts to automate tasks, such as clearing the cache or making backups.
Dangers of working in the terminal
Deleting system files using the rm -rf command in the root directory can turn the phone into a “brick”. Always double-check paths before entering commands with superuser rights.
Working in the terminal requires caution. One typo in a command can lead to the deletion of important data. It is recommended to first test the commands in a safe environment or on an emulator before using them on the main device.
⚠️ Attention: When using a terminal without root access, many system utilities will return a “Permission denied” error. Do not try to bypass this limitation without understanding the consequences.
Running features on different versions of Android
The Android ecosystem is extremely fragmented. The way you run utilities on an older device may be completely different from the methods on a new flagship. Manufacturers often modify the system by adding their own launchers and limiting access to system calls.
On devices with pure Android (for example, Google Pixel, Motorola), ADB commands work most stably and predictably. At the same time, on shells like MIUI, OneUI or ColorOS additional steps may be required, such as unlocking the bootloader or special permission in the developer menu.
Starting with Android 11 and higher, Google has introduced restrictions on wireless debugging and access to certain folders. Some utilities now require confirmation via a QR code or entering a pairing code to launch. This is done to improve security, but makes life more difficult for advanced users.
Always check the specific requirements of your Android shell before trying to run system utilities, as standard methods may be blocked by the manufacturer.
In addition, in new versions of the system, the mechanism for working with background processes has been changed. Utilities that could previously run constantly in the background can now be put to sleep by the system to save battery. You must manually disable battery optimization for such applications.
Solving problems when launching tools
Often users are faced with the fact that the utility does not start, crashes, or generates an error. The most common reason is a version conflict or lack of necessary permissions. Check if the application has rights to access storage, phone or other functions.
If the ADB command does not work, make sure that the drivers are installed correctly. Try replacing the USB cable or port. Sometimes a simple reboot of both devices—the computer and the smartphone—helps.
If the terminal produces errors when executing scripts, check the syntax. The case of letters in Linux commands matters. Also make sure that the file path is correct, using absolute paths, for example /data/local/tmp/script.sh.
- 🔄 Reboot the device into safe mode to eliminate the influence of third-party applications.
- 🧹 Clear the cache of the application you are trying to launch through the settings.
- 🔌 Disconnect and connect again USB cable, changing the operating mode from “Charging” to “File Transfer”.
If the problem persists, your firmware may have blockages at the kernel level. In this case, the only solution may be to install a custom recovery or get root access, which carries its own risks.
Is it possible to run the utility without root access?
Yes, many utilities, especially those related to debugging via ADB or collecting statistics, work without Root. However, accessing system files and changing protected settings will require elevated privileges.
Is it safe to use the engineering menu?
Viewing information in the engineering menu is safe. However, changing parameters (especially those related to processor frequencies or radio module) can lead to overheating or loss of communication. Do this only if you are completely sure.
Why doesn’t ADB see my device?
Most often the problem is in the drivers, cable, or lack of enabling the “USB Debugging” mode. Also check if the phone screen is locked at the time of connection, as some devices require unlocking to confirm access.
How to find the name of the application package?
The package name can be found through the app settings (at the bottom of the page), using special identifier applications from the Play Market or through the command adb shell pm list packages on the computer.