The Android One series, which includes the Xiaomi Mi A3, offers a clean interface but often hides advanced settings deep inside the system. The standard menu limits the user's ability to fine-tune the behavior of the interface or connect to the computer for deep debugging.
Enabling this feature gives you access to dozens of options, from animation speed to forced GPU rendering. It's not just a toy for enthusiasts, it's a tool for those who want to get the most out of their device. Without activating this option, many system utilities simply won't see your phone.
In this article, we will discuss the activation process in detail, explain the assignment of key parameters and warn about the possible risks of changing system settings. A3.
Why you need to access the engineering menu on Android One
The main purpose of hiding these settings is to protect inexperienced users from accidentally changing critical parameters that can disrupt the operation of the operating system. However, for advanced users, developer mode is the key to customization. For example, you can zoom in fonts or DPI screens, which is not available in the regular menu.
In addition, without activating this feature, you can not work with the ADB debugging tools (Android Debug Bridge), which is necessary for installing applications outside the Google Play store, removing system logs when errors are made, or flashing the device through the computer, without this step, the computer will not “recognize” the phone as a debugging device.
It also has settings that affect visual performance, and speeding up animations creates the illusion of a faster smartphone experience, making the response instantaneous, especially for the Xiaomi Mi A3 to smooth out possible micro-latency interfaces.
- 🔓 Unlock the ability to install applications from unknown sources ADB.
- 🚀 Accelerating transitions between windows and animations of opening applications.
- 📱 Testing of the touchscreen and proximity sensor in real time.
- 📡 Bluetooth Codec Management and Audio Stream Quality Customization.
⚠️ Note: Changing the settings in the For Developers section can lead to unstable system operation.
It's worth noting that on pure Android, which is installed on the Mi A3, the settings interface is different from the MIUI shell. There are no ad units, but also the navigation is more strict. All changes are instant, which requires special care when experimenting with graphics accelerators.
Step-by-step instructions for activating hidden settings
The process of switching on Xiaomi Mi A3 is standard for all devices based on Android 9, 10 and 11, but has its own nuances in the location of the menu items. You do not need superuser rights (Root) or connection to the PC. All actions are performed directly on the screen of the smartphone.
The first thing you need to do is open the main settings menu, find the gear icon on your desktop or notification curtain, and we're interested in the System section, which is usually at the bottom of the list or in the main settings group.
Within Systems, select About Phone, and it displays all the technical information: Android version, security patch level, and most importantly, build number, and it's from the Build Number field that the system identifies who is a user and who is a developer.
Find the build number and quickly press it 7 times in a row. You do not need to pause between clicks, but you should also not “knock” too quickly. After 3-4 clicks, the system will give a pop-up notification: “You are 4 steps from activating the developer mode.”
If the phone has a lock screen with PIN-If you use a code or a graphical key, the system will require you to verify your rights. Enter your password. After you successfully check, you will see a message saying, "Now you're a developer.
| Action. | System response | Required condition |
|---|
| 1-3 pressing | Absent. | No. |
| 4-6 presses | Report on the number of remaining steps | No. |
| 7th press | Requesting an unlock password | PIN/pattern lock installed |
| Password entry | Activation of the menu | Correct password |
Once activated successfully, go back one step to System, and immediately under About Phone or System Update, a new Developer section will appear, and now it's open.
Where to find the menu after activation and how to manage it
On the Xiaomi Mi A3 with a clean operating system, the navigation logic remains unchanged even after unlocking features. The new item does not pop up on the main screen, it is integrated into the system settings structure. You can find it along the way: Settings → System → For developers.
Inside, you'll see a long list of parameters divided into logical groups: debugging, networking, input, drawing, etc. At the top of the list is the master switch. While it's off (gray), all other settings inside the partition are locked and inactive.
Why are the settings grey?
If you see that all the items inside the menu are faded and not pressed, you forgot to activate the master switch at the top of the screen. First turn on the developer slider, and then the rest of the functions will be available.> To turn on the entire partition, you just need to turn the top slider into the active position, the system can again request confirmation of the action with a risk warning, agree if you consciously go to this step, and now all the parameters are available for editing. It's important to understand that leaving this menu doesn't reset the changes you've made. If you've accelerated animations or enabled debugging, those settings will stay until you change them back or complete a reset of your phone's settings. 📍 Path to the menu: Settings → System system → For developers. 🔘 Main: The top switch activates the entire partition. 🔍 Search: At the top of the settings screen, there's a magnifier that you can use to find the word "developer" and search is the quickest way to get to the menu if you're lost in long lists of options. Just type the word "developer" into the settings search bar, and the system will suggest the transition. USB and work with ADB One of the main reasons why users of the A3 Including this mode, is the need to communicate with the computer at a deep level. USB It allows you to send commands directly to the operating system, bypassing standard interface constraints. USB And turn it on. When you first connect the cable to your computer, you'll see a dialog box on your smartphone screen asking for debugging permission. RSA. You must tick "Always allow from this computer" and click "OK." Without confirming this request on the phone screen, the computer will not gain access to the file system or command line of the device. It's an important security measure to prevent data theft when you connect to someone else's charging station in public. USB When you connect, by default, the phone can only charge. USB You can choose the default file transfer mode (MTP) or PTP, The computer can see photos and documents immediately. ⚠️ Warning: Never turn on the debugging on USB, If you're in suspicious public Wi-Fi networks or if you're connected to unknown computers, that gives you full access to your device, and if you're an app developer, it's helpful to use the "Don't Turn Off Screen" feature when charging. This allows you to test interfaces without constant unlocking. On the Xiaomi Mi A3, this option is at the top of the debugging menu. Optimizing the interface and animations for performance The visual part of Android One is optimized enough, but standard animations can seem slow. In the For Developers section, there is a setup called Drawing. Here are the parameters for the animation scale. Find three items: "Window animation", "Transition animation" and "Duration of animation." By default, they are set to "1x" (or "Animation is enabled 0.5x"), this changes in the experience of the processor does not halve the real value of the system. For Mi. A3 his AMOLED-It's a nice instant response effect, and you can also experiment with the rendering engine, and you can either download textures or turn on textures. 4x MSAA» (OpenGL ES 2.0) can improve graphics in games, but will cause the battery to discharge faster and heat the case. GPU Some programs that are optimized for CPU work may not work properly or crash. Use these features only for testing or in specific games where you notice an increase. FPS. 🎨 Animation. 0.5x — Gold Standard for Speeding Up Interface. 🚫 Animation “Switch off” – makes transitions instantaneous, but looks sharp and unpleasant. 🎮 4x MSAA — Improves anti-aliasing in games, but heats up your smartphone. Remember, the changes take effect immediately. You can change the values on the fly and evaluate the result without restarting the device. The development section on the Xiaomi Mi A3 contains tools for monitoring resources. Process Statistics or Working Services shows which applications are currently active and how much RAM they consume. This helps to find the “gluttonous” programs that slow down the system. Here you can set a limit of background processes. If you have little RAM (for example, the 4 GB version), you can limit the number of working in the background of applications. However, the Android system itself manages memory well, and artificial restriction can lead to the fact that the “glutig” of the notification in time – another useful feature is sent. If you turn on "Show touches," you'll see white dots in the places where your finger touches the screen, which is a great tool to check the touchscreen, especially if you suspect dead zones or rattles. Also available is the "Do Not Turn Screen" mode, which blocks the accelerometer even if the autoturn is turned on in the curtain. This is convenient when watching video lying on your side, when the sensor may mistakenly turn the picture. What to do if the Internet is lost after changes? Sometimes changing the network settings or DNS In developer mode, you can lose your connection, so if you do that, you can find "Reset your Wi-Fi, mobile and Bluetooth settings" at the bottom of the list, or you can completely reset your network settings in the regular menu. How do you turn off the developer mode completely? To hide the menu back, go to Settings → System system → For developers and turn off the top switch. After that, the "Developers" item will disappear from the system menu until you click on the build number 7 times again. Does this affect the warranty? Activation of the developer mode by itself does not violate the warranty terms of Xiaomi or Google. The guarantee is only lost when you get a Root, unlock the bootloader, or have a physical breakdown caused by the wrong settings. Can I delete this menu? You can't delete the system partition because it's built into the firmware. It can only be hidden (deactivated) through the switch as described above. It's a regular Android feature, not a third-party app. Are settings reset after rebooting? No, all the changes made to the developer menu (scale animation, debugging) USB), Reset occurs only when you execute the "Reset" command inside the menu or completely wipe data.