Developer mode on Xiaomi MIUI 12: how to turn it on and why it is necessary

Xiaomi’s MIUI 12 developer mode provides access to hidden settings that the manufacturer hides from ordinary users. It’s a powerful tool for fine-tuning the device, debugging applications and optimizing performance. However, many owners of Redmi, Poco or Mi don’t know how to properly activate this mode without risking the system.

In this article, we'll go into detail about the entire process, from preparing the device to checking for successful activation, and not only the standard way to turn on, but also the alternative methods for cases where the classic instruction doesn't work, and focus on security: which settings can be changed without risk, and which ones should not be touched, and at the end, you'll find an FAQ with answers to the most frequent user questions.

What is a developer mode and why it is needed

Developer Mode is a special Android settings section designed to test and debug applications. On MIUI 12, it is hidden by default, as incorrect changes can lead to unstable smartphone operation. However, for power users, this is a real find.

The regime's main capabilities:

• 🔧 Debugging with USB – Connecting to a PC to work with ADB and Fastboot
• ⚡ Acceleration of animations – changing the speed of transitions between windows
• 📡 Network settings – forced on 4G/5G, changing network type
• 🔄 Settings reset – selective reset without data loss
• 🛠️ Error Logs – Collecting reports to diagnose problems

On MIUI 12, the developer mode is particularly useful for:

• 🎮 Gamers – Enable Game Turbo Mode with Advanced Settings
• 📸 Photographers – Manually adjusting camera settings via Camera2 API
• 🔋 Optimizers – limiting background processes to save battery life

⚠️ Warning: Changing the settings in the For Developers section may result in a loss of warranty if the device was purchased less than a year ago.The manufacturer has the right to refuse service if traces of interference with system settings are detected.

Preparation of the smartphone before switching on the mode

Before you activate the developer mode, you need to follow several preparatory steps, which will help to avoid errors and ensure stable operation of the system.

Device requirements:

• 📱 MIUI 12 (Redmi Note 9/10, Poco X3, Mi 10/11, etc. are supported)
• 🔋 Battery charge of at least 50% (70 percent recommended for long-term manipulation)
• 📶 Stable Internet connection (to check for updates)
• 🔐 No locking of the Pin/ Password (if you have one, remember it!)

What to do in advance:

1. Backup important data through Settings → About Phone → Backup
2. Make sure the device has the latest version of MIUI 12 installed (checked in Settings → About Phone → System Update)
3. Turn off automatic screen locking during setup (so as not to interrupt the process)

Make a backup of data | Check version of MIUI| Charge phone to 70% | Disable screen-lock-->

⚠️ Warning: If your Xiaomi smartphone was purchased in China (global version with firmware CN), some menu items may be missing or have a different name, in which case you will need to unlock the bootloader before activating the developer mode.

Standard way to enable developer mode

The classic activation method works on 90% of devices with MIUI 12, and it involves repeatedly tapping the build number.

Step 1. Open Settings (the gear icon on the home screen or in the app menu).

Step 2. Scroll down and select About Phone (may be called About Device on some models).

Step 3. Find the MIUI version line and press it 7 times in a row. After the first 3-4 clicks, a pop-up will appear, "You're almost there!"

Step 4: At press 7, the system will display a message saying, "You've become a developer!", which means that the mode has been successfully activated.

Now in the main menu of Settings will appear a new section – Additional → For developers (on some firmware it can be immediately in the root menu).

Alternative Incorporation Methods (if Standard Incorporated Does Not Work)

In rare cases, the standard method may not work, because:

• 🔄 Customized firmware (e.g. Xiaomi.EU or Pixel Experience)
• 🔒 Corporate Policy Restrictions (on work phones)
• 🛠️ Damaged system files after failed update

If you have this problem, try one of the alternative methods:

Method 1. via ADB (for advanced users)

You will need a computer with Xiaomi drivers installed and ADB program.

adb shell settings put global development_settings_enabled 1


adb shell am start -n com.android.settings/.DevelopmentSettings

After these commands are executed, the developer section should appear in the settings.

Method 2. Through the Engineering Menu

1. Open the phone app and enter the combination: ##4636##
2. Select Phone Information and hold the Menu button (three dots) in the upper right corner for 5-7 seconds.
3. If you have a password request, use the standard 1234 or 0000.

Method 3. Through resetting settings

This will delete all the data on the device, and only use it as a last resort.

1. Go to Settings → Additional → Recovery and Reset
2. Select Reset and confirm the action
3. After the reboot, try the standard activation method (7 taps on the MIUI version)

💡

If you are using MIUI 12 based on Android 11+, after activation of the developer mode, you may need permission to debug via USB via your computer. To do this, connect your phone to your PC, select File Transfer mode and confirm access in the window that appears on the smartphone screen.

What settings can be changed safely

Once you activate the developer mode, you'll see more than 50 different settings, but not all of them are safe to change. Below, we'll list settings that can be modified without risking system stability.

Safe settings (the risk is minimal):

• 🎯 Do not turn off the screen while charging - useful for watching video
• ⚡ Window/transition animation – UI acceleration (set 0.5x)
• 🔊 Turn off absolute volume – fixes sound problems in Bluetooth headphones
• 📶 Network type – forced on 4G or 3G when a bad signal is triggered
• 🔋 Background processes – limiting to 2-3 processes to save battery life

Medium risk settings (change carefully):

• 🔄 Do not save actions – disables the latest application log (may disrupt multitasking)
• 🛠️ GPU- Acceleration – Forced switching on can trigger artifacts in games
• 📡 Modem Modem – Changing the settings of the access point can lead to connection problems

Dangerous settings (not recommended to be changed):

• 🚨 Unlocking OEM – may cause the bootloader to lock on some models
• 🔥 Disable MIUI – disrupts system applications
• ⚠️ Mobile Network Resetting Wi-Fi/ – Could Cause Connection Issues

💡

Changing the settings of Do Not Save Actions and Background Processes can lead to automatic closure of applications (for example, music players or instant messengers).

How to turn off the developer mode

If you no longer need advanced settings or want to return your smartphone to factory status, you can deactivate the developer mode.

Method 1. Through settings (soft shutdown)

1. Go to Settings → Additional → For Developers
2. In the upper right corner, press the switch (it will turn grey)
3. Confirm the disconnection in the window that appears

This method saves all the changed parameters, but hides the section from the menu.

Method 2. Through reset (complete removal)

If you want to completely remove all traces of the developer mode:

1. Perform reset settings through Settings → Additional → Restore and Reset → Reset settings
2. Select Reset Network Settings (optional if you have changed network settings)
3. After restarting, the developer mode will be deactivated.

⚠️ Warning: Some Xiaomi models (e.g. Redmi K40 or Mi 11 Ultra) may need to be re-activated after deactivation to access previously modified settings. Write down all important settings before deactivation.

Frequent mistakes and their solution

When you're working with a developer mode, you often have typical problems, and we've collected some of the most common bugs and ways to fix them.

If none of the methods suggested helped, try:

1. Update the firmware to the latest version through Settings → System Update
2. Perform a reset (without deleting data) through Settings → Additional → Restore and Reset
3. Contact Xiaomi Service Center (if the problem is related to hardware)

FAQ: Answers to popular questions