Modern mobile devices based on the operating system Android provide users with enormous opportunities for customization and fine-tuning. However, most of these functions are hidden from the eyes of the average user by default to prevent accidental changes to critical system parameters. Of particular interest is the section designed for debugging applications and testing functionality - the so-called developer mode.
In the version Android 10 the logic for accessing these hidden settings remained unchanged compared to previous releases, but the interface and the names of some items may have undergone minor changes depending on the manufacturer's shell. Enabling this mode provides access to USB debugging, setting the interface animation speed, managing background processes and other advanced tools. This is necessary not only for programmers, but also for enthusiasts who want to speed up their smartphone or transfer files via USB debugging ADB.
Below we will analyze in detail the process of activating the hidden menu, consider the main parameters and give recommendations for the safe use of advanced functions. Follow the instructions carefully, as incorrectly changing some settings can lead to unstable operation of the device.
Finding the build number in the device settings
The first step towards unlocking advanced features is to search for a special firmware identifier. Unlike standard menus, this option is not placed on the main settings screen and is hidden deep in the system sections. You will need to go to the main settings menu of your smartphone and find the About phone or Phone informationsection. Depending on the device model and shell version, this item may be at the very top of the list or in the subsection System.
Inside the device information section, you need to find a line containing information about the software version. On pure Android 10 (for example, in smartphones Google Pixel) this line is called Build number. In shells from other manufacturers, such as MIUI ot Xiaomi or One UI ot Samsung, the name may vary, but the essence remains the same. Sometimes you need to click on the item MIUI version or One UI versionto access the internal build number.
It is important to understand that simply clicking on this item once will not give any result. The system intentionally hides this feature to avoid accidental activation by inexperienced users. It is repeated pressing that serves as a kind of protective mechanism, confirming the awareness of your actions. If you cannot find the item you need, use the search inside the settings by entering the query "build number" or "build number".
If searching through the settings does not help, try entering the word "build" or "assembly" in the search field in English or Russian, respectively.
The process of activating the hidden menu
After you have found the treasured line with the build number, the most important stage begins. You need to quickly click on this item seven times in a row. You should not make pauses between clicks too long; the system should count them as a series of quick clicks. Typically, after the third or fourth press, a pop-up notification will appear on the screen with a countdown telling you how many times you need to press to activate the mode.
If your device has a lock screen protected by a password, PIN code, or pattern, the system will ask you to confirm your ownership rights. This is a critical element Android securitythat prevents attackers from gaining access to system settings if they gain physical access to an unlocked phone. Enter your unlock code in the window that appears.
After successfully entering the code or confirming your fingerprint, you will see a message stating that developer mode is activated. In some firmware, an additional notification may appear warning you that enabling USB debugging allows your computer to control your phone. This is a standard warning and can be ignored at this stage if you trust the connected hardware.
Location of the new partition in system
After successful activation, a new item appears in the main settings menu. In the stock version Android 10 it is usually located in the section System and is called For developers. In custom shells, the logic may be different: this section is often located in the category Xiaomi this section is often found in the category Additional, and at the very bottom of the list of main settings, right after the item Samsung - at the very bottom of the list of main settings, immediately after the item About phone.
Inside this menu you will find many switches and settings, grouped by functionality. Here you can manage network settings, input, hardware rendering acceleration, and application monitoring. The interface of this section is usually made in the same style as the rest of the system settings, but is filled with technical terms that may not be clear to the average user.
Please note that immediately after entering the menu, some functions may be disabled by default. For example, USB debugging is always disabled the first time you enable Developer Mode for security reasons. You will need to manually switch the desired toggle switch to the active position, confirming the action in the pop-up dialog box.
⚠️ Attention: Do not change the settings in the “For Developers” section if you are not sure of their purpose. Disabling critical system processes can cause your smartphone to freeze or lose data.
☑️ Activating Developer Mode
Setting up USB debugging and working with ADB
One of the most popular functions in this section is USB debugging. This option allows the computer to communicate with the smartphone through the command line interface ADB (Android Debug Bridge). Using this tool, you can install applications directly, make full system backups, remove error logs, and even unlock the bootloader on some devices.
To get started, you need to connect your smartphone to your computer using a high-quality USB cable. The first time you connect with debugging enabled, your phone screen will ask you to allow debugging from this computer. The system will display the unique RSA fingerprint key. It is recommended to check the box Always allow from this computerso as not to confirm the connection every time.
If the computer does not see the device, check the operating mode of the USB connection. By default, the phone can charge but not transfer data. Pull the notification shade down, tap the charging notification and select mode File transfer (MTP). Only after this the command adb devices in the computer terminal will be able to identify your device.
adb devices
List of devices attached
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The function Selecting an application to debugis also available in this section. It allows you to specify a specific application that will be debugged when connected. This is useful for developers who are working on a specific project and do not want to receive debugging notifications for all installed apps.
What should you do if debugging does not turn on?
If the USB debugging switch is grayed out or turns off immediately, check whether the device is connected to the computer. In some firmware, the function is activated only if there is an active USB connection to the PC. Also make sure that the cable is in good condition and supports data transfer, and not just charging.
Managing animation and interface performance
Many users enable developer mode solely for one purpose - to speed up the visual perception of the system. In the settings section for developers, there are three key parameters responsible for animation speed: Window animation, Animation of transitions and Animation duration. By default, they are all set to the value 1x.
Changing these values to 0.5x visually makes the interface more responsive and faster. Animations do not disappear completely, which maintains a smooth experience, but they are performed twice as fast. This is especially noticeable when opening applications, minimizing windows, and switching between tasks. The value 0x disables animations completely, making transitions instantaneous, but sometimes it looks too harsh and unnatural.
In addition to animations, in this section you can find settings Background processes. It allows you to limit the number of applications that can run in the background at the same time. Setting a limit can help free up RAM on devices with little RAM, but it can also cause messaging apps to stop sending notifications on time and music to stop when you switch to another app.
| Animation option | Default value | Recommended value | Effect |
|---|---|---|---|
| Window animation | 1x | 0.5x | Acceleration of opening/closing applications |
| Animation of transitions | 1x | 0.5x | Acceleration of switching between screens |
| Animation duration | 1x | 0.5x | General acceleration of all system effects |
| Font scale | Normal | Individual | Changing the text size in the interface |
The optimal value for the balance between speed and smoothness of the interface is the animation scale of 0.5x.
Additional functions and network settings
Developer mode on Android 10 contains a number of functions useful for testing networks and diagnosing problems. For example, the function Show touches displays a small white circle where you click on the screen. This is extremely useful when creating screencasts or tutorials so that viewers can see exactly where you press.
The option Keep the screen on while charging is also available. If you use your smartphone as a navigator in your car or as a control panel for your smart home, this feature will prevent the display from automatically turning off while the device is connected to a power source. This eliminates the need to constantly tap on the screen to keep it active.
For advanced users, the section Networkis of interest where you can enable Bluetooth logging, configure DNS configuration, or activate strict HTTPS inspection mode. These tools allow you to diagnose connection problems and analyze network traffic at a low level.
- 🔍 Show Surface Updates —highlights areas of the screen that have been redrawn in green. Useful for optimizing applications.
- 📡 Enable Bluetooth HCI Log - Saves Bluetooth connection logs to a file for later analysis of pairing errors.
- ⚡ GPU acceleration - Forces the use of the GPU to render 2D elements, which can improve performance in older games.
⚠️ Attention: Enabling the "Keep the screen on" function when charging can lead to matrix burn-in on AMOLED displays if a static image is displayed on the screen for a long time. Use with caution.
Factory Reset Mode
If you accidentally changed a critical setting or simply want to return the system to its original state, you do not need to reset the entire phone to factory settings. At the very top of the menu For developers there is a main switch that activates or deactivates the entire section.
When you turn off this switch, all parameters you have changed within the developer menu are reset to their default values. The section itself disappears from the settings menu, as if you had never turned it on. To access it again, you will have to repeat the procedure by clicking on the build number seven times.
This is a convenient mechanism that allows you to temporarily activate the mode to perform a specific task (for example, transferring files via ADB or removing logs), and then safely disable it to eliminate the risk of accidental interference with the system by children or other users.
What happens if I delete applications through the menu developer?
In developer mode there is an "Inactive applications" function that allows you to delete or disable system applications. If you remove a critical system component (such as the system UI or Google Play Services), your phone may stop booting or enter an endless bootloop. In this case, you can restore functionality only by flashing the device.
Why doesn’t USB debugging work after turning it on?
A common reason is the use of a charging cable that does not support data transfer. The problem may also be with the USB drivers on the computer. Try replacing the cable with an original one or a known good one, and installing official drivers for your smartphone.
Is it possible to enable developer mode without a computer?
Yes, activating developer mode and changing most settings (for example, animation) do not require connecting to a computer. A computer is only needed to use the ADB or Fastboot debugging tools.
Does Developer Mode affect the warranty of the smartphone?
Enabling Developer Mode and changing animation settings in itself does not void the warranty. However, if you use this mode to unlock the bootloader, install custom recovery or root access, this may lead to loss of warranty service in official service centers.