How to turn on the developer mode on Xiaomi Redmi Note 9 Pro: a complete guide with pictures

Xiaomi Redmi Note 9 Pro hides powerful tools under the hood to fine-tune the system, but access to them is closed by default. Developer mode is a special menu that allows you to manage parameters that are not available in standard settings: from performance optimization to debugging via USB. Without it, you can not unlock the bootloader, flash custom software or even just speed up the animation of the interface.

Turning on this mode on the Redmi Note 9 Pro takes less than 5 minutes, but requires strict follow-up instructions. An error at any stage can lead to access blocking or MIUI failures. In this article, we will discuss the official activation method (without root rights), explain what settings become available after turning on, and warn against the typical errors that 80% of users make when they first start.

Why is the developer mode hidden by default?

Xiaomi (and other Android device manufacturers) deliberately hides these settings to prevent accidental changes in settings that can:

• 🔧 Violate the stability of the system – improper kernel or graphics accelerator settings often lead to “offs” of applications.
• 🔒 Reduce security - debugging by USB Opens access to device data when connected to a PC.
• 📉 Reduce battery life – forced activation of all processor cores drains the battery in 3-4 hours.
• ⚠️ Cancel Warranty – Some changes (such as unlocking the bootloader) are considered unauthorized interference.

However, for experienced users, this mode is the only way to:

• 🚀 Speed up the interface by disabling transition animation.
• 🔄 To update the firmware if OTA-loading".
• 📱 Test applications in developer mode (e.g., emulate other screen resolutions).
• 🔧 Unlock the bootloader for installing custom firmware such as LineageOS or Pixel Experience.

⚠️ Note: Redmi Note 9 Pro with firmware MIUI 14+ After you turn on the developer mode, the system may require you to enter a password from your Mi Account account every time you log in to this menu!

Preparation of the smartphone before switching on the mode

Before activating the developer mode, follow the mandatory steps:

Check battery power (minimum 30%)| Connect to stable Wi-Fi | Update MIUI to latest version | Make backup of data | Make sure the device is free of viruses-->

Pay special attention to the version MIUI. Redmi Note 9 Pro with older firmware MIUI 12.5 The path to the developer menu may be different:

1. Open the Settings. → The phone.
2. Scroll to MIUI version – write down or remember a number (for example, 14.0.5.0.SJZMIXM).

If your firmware is outdated, update it through Settings → System Update. Using outdated versions of MIUI can be dangerous:

• 🔄 Absence of the item "Assembly number" in the menu "About phone".
• 🚫 Blocking access to developer mode after 7 days of inactivity.
• 🐞 Failures in debugging through ADB (device is not defined by the PC).

⚠️ Note: Some firmware for the Redmi Note 9 Pro (e.g. global) EEA) After activating the developer mode, a warning about an “uncertified device” may appear in Google’s settings. This is not a mistake – just confirm certification through Google Settings. → Certification.

Step-by-step instruction: how to turn on the developer mode

Follow the algorithm precisely to avoid blocking the menu:

1. Step 1. Open Settings (the gear icon on the home screen).
2. Step 2. Scroll down and select About Phone.
3. Step 3. Tap the MIUI version (or Device Information → Assembly number on MIUI 14+).
4. Step 4: Quickly tap the build number 7 times in a row, and after 3-4 taps, a pop-up will appear, "There are 4 taps left to become a developer."
5. Step 5: After tap 7, the system will display a notification saying, "You are now a developer!" which means that the menu is unlocked.
6. Step 6: Return to the main Settings menu and a new Developer Form (or Advanced Settings → Developers on older versions of MIUI) will appear.

If after 7 taps the menu does not appear:

• 🔄 Reboot your smartphone and repeat the steps.
• 📱 Check if the device has Second Space or Child Mode installed – they block access.
• 🔧 Update. MIUI Up to the latest version (see table above).

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If you can't tap 7 times in a row, use a stylus or turn on touch and hold in the special features settings to avoid accidental tap passes.

Where is the developer menu after activation?

The menu location depends on the MIUI version:

• 📱 MIUI 12-13: Settings → Additionally. → For developers.
• 📱 MIUI 14+: Settings → The phone. → Additional settings → For developers.
• 📱 Global firmware (EEA/Global): Settings → System system → Extended. → For developers.

If the item disappeared after the reboot:

1. Repeat activation (7 taps by "Assembly Number").
2. Check if it is hidden in the search settings (swipe down in the main Settings menu and type “developer”).
3. Make sure that the device is not active Guest Mode or Private Mode.

Top.-5 Useful features of the developer mode for Redmi Note 9 Pro

Now that the menu is activated, consider the most popular settings that will be useful to owners of the Redmi Note 9 Pro:

1. Speed up interface animation: Path: For developers → Animation speed. Set the values Window animation: 0.5x, Transition animation: 0.5x, Animator Duration: 0.5x. Effect: the interface will respond 20-30% faster.
2. 4G/5G Forced Activation: Path: For developers → Network → Network → Network type of network preferred. Select LTE only or NR/LTE/TD-SCDMA... for 5G priority (if supported by an operator).
3. USB Debugging (ADB): Path: For developers → USB debugging. Activate this item to connect your smartphone to your PC for firmware or backup.
4. Unlocking OEM: Path: For Developers → Unlocking OEM. A mandatory step before unlocking the bootloader to install custom firmware.
5. Background Processes: Path: Developer → Applications → Process Limit. Set a Standard Limit for Battery Savings or No Limit for Multitasking.

⚠️ Warning: Changing the minimum width (dp) setting in the developer menu can lead to incorrect display of applications. For example, a value of 500 dp stretches the interface, but breaks the layout on Instagram and TikTok. Return the standard value (360 dp) if you notice bugs.

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Not all settings in the developer menu are safe. Changing the kernel settings (such as Disable HW overlays) can cause the Snapdragon 720G processor to overheat and automatically reboot the device.

Frequent Mistakes and How to Avoid Them

Even experienced users make mistakes when working with the developer mode.-5 problems and solutions:

The problem with unlocking the bootloader is especially dangerous. On the Redmi Note 9 Pro, this process is:

1. Requires a binding to your Mi Account (at least 7 days of waiting after the binding).
2. Wipes all data on the device (including photos and apps).
3. It can lead to a brick (complete inoperability) if the process is interrupted.

How to turn off developer mode (if it is no longer needed)

If you have completed the setup or want to return the smartphone to factory security parameters, turn off the developer mode:

1. Go to Settings. → For developers.
2. In the upper right corner, tap the switch (it will turn gray).
3. Confirm the action in the dialog window.

After the shutdown:

• 🔄 All changes to the developer menu will be reset to standard.
• 🔒 Debugging by USB and unlock OEM will not be available.
• 📱 The Developer Item will disappear from the settings (but it can be activated again with 7 taps).

If the menu is not lost after the shutdown:

1. Reset the device.
2. Reset settings through Settings → Restore and Reset → Reset settings (without deleting data).
3. Update MIUI to the latest version.

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Before you turn off the developer mode, take screenshots of your current settings (such as animation or network settings) and this will help you quickly restore them if you need to activate the menu again.

FAQ: Answers to Frequent Questions