How to enable the developer mode on Xiaomi Redmi 9T: hidden features MIUI

Xiaomi Redmi 9T, powered by MIUI, hides dozens of useful features from users, from fine-tuning animations to overclocking the processor, all hidden behind what is known as developer mode, which is disabled by default, and can be turned on in minutes, but the process requires a few nuances, from the right sequence of taps to the potential risks of careless actions.

This guide will take a look at how to activate developer mode on Redmi 9T (model M2010J19SG), what features become available after you turn on, and how to avoid typical errors. We will also compare the mode capabilities on different versions of MIUI (12 to 14) and explain why some options may not be available on your device, if you plan to install custom firmware, test applications through ADB or just want to speed up your smartphone, this guide is for you.

What is a developer mode and why you need it on Redmi 9T

Developer Mode is a hidden Android settings section designed to test and debug apps. On the Xiaomi Redmi 9T, it gives you access to:

• 🔧 Debugging by USB — mandatory for work with ADB, Unlock the bootloader and firmware through Fastboot.
• ⚡ Performance setting: forced activation 4G instead 3G, limitation of background processes.
• 🎨 Change animations: speeding up or turning off transitions between screens.
• 📡 Hidden network parameters: selecting a mobile network type (LTE-only), displaying the signal strength in dBm.

Without this mode, it is impossible to perform many operations, for example:

• 🔓 Unlock the bootloader for installation TWRP ornamental.
• 📱 Testing apps in Android Studio through a connection USB.
• 🔄 Change. DNS-servers without third-party applications.

Beware, though: Incorrect settings can lead to CPU overheating, accelerated battery drain, or even soft-brick (when the smartphone turns on but doesn’t boot beyond the logo).For example, forcing MSAA 4x to play on a weak Snapdragon 662 chipset (which stands in the Redmi 9T) can cause lags and reboots.

Preparing a smartphone before turning on the developer mode

Before activating the mode, follow several mandatory steps:

Charge the battery at least 50% | Update MIUI to the latest version | Disable VPN or proxy | Make sure the device has enough free memory (minimum 1 GB)

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Pay special attention to MIUI versions. Redmi 9T often has outdated firmware out of the box, where the path to developer mode may differ.

1. Open the Settings. → The phone.
2. Scroll down to the MIUI version.
3. If the version is older than MIUI 12.5, update via Settings → System Update.

Also make sure that there are no active restrictions on your smartphone (such as parental controls or corporate policies) that can block access to hidden settings. If you have previously installed Google Apps through Open GAPPS, some features of the developer mode may not work properly.

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After the update MIUI Item "Build number" disappeared from the menu "About phone", try resetting the settings application via Settings → Annexes → Application management → Settings → Warehouse → Clear the data.

Step-by-step: how to turn on the developer mode on Redmi 9T

The activation process takes less than a minute, but requires precise steps to be taken, and an error at any stage will cause the mode to fail.

1. Open Settings: Slip the Settings icon (cog) on the home screen or in the application menu.
2. Go to About Phone: Scroll down the list and select About Phone (usually the last item).
3. Find MIUI Version: In the device information block, find the MIUI Version string. Stick it 7 times in a row. What happens if you tap it 7 times instead of 7? Some versions of MIUI have an Easter egg after the 10th tap, an animation with the Xiaomi logo. However, the developer mode is not activated. It requires 7 precise taps with an interval of no more than 2 seconds between them.
4. Confirm activation: After the 7th tap, a notification will appear: "You became a developer!". Now a new option will appear in the main Settings menu Additional → For developers.

If nothing happens after 7 slaps:

• 🔄 Make sure you are using the version. MIUI, not by Assembly Number or Device Model.
• ⏱️ Press at intervals of less than 1 second – too slow taps do not count.
• 📱 Reboot your smartphone and try again.

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On Redmi 9T with MIUI 14, the path to Developer Mode has changed: it is now in Settings → Additional → Developer Settings. In older versions (MIUI 12) – in Settings → Advanced Settings → For Developers.

Where to find the developer mode enabled and what features are available

Once activated, the new partition will appear in the settings, but its location depends on the version of MIUI.

Inside the mode you will find more than 50 settings, broken into blocks:

• 🔌 Debugging: Debugging by USB, Debugging over Wi-Fi, Allow unlocking OEM (required to unlock the loader!).
• ⚙️ Network: Carrier aggregation, Network type (2G/3G/LTE).
• 🖥️ Productivity: Enforcement of the use GPU, Limitation of background processes.
• 🎮 Intro: Show touches, magazine buffer size.

On the Redmi 9T with the Snapdragon 662 chipset, enabling the option of "Forced use of the GPU" can lead to artifacts in games and overheating. Xiaomi officially does not recommend activating this feature on budget devices.

Dangerous settings: what not to touch in the developer mode

Not all options in developer mode are safe. Some may:

• 🔥 Overheat the processor (for example, do not turn off the screen while charging).
• 📉 Speed up battery discharge (activity in the background without restrictions).
• 🚫 Disable the sensor (disable absolute touch coordinates).

Here. TOP-5 Settings that are better not to touch on Redmi 9T:

1. Turn off the absolute coordinates of the touches - the sensor will stop working correctly.
2. Do not save operations – will lead to the loss of application data after restarting.
3. Forced shutdown of applications can cause a system crash.
4. Changing the size of the VM – incorrect values will lead to memory errors.
5. Background check – will increase the load on the processor without any apparent benefit.

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If you accidentally activate a dangerous setting and your smartphone starts to glittle, reset the developer mode settings: go to Settings → Apps → App Management → Settings → Storage → Clear the data. This will return all settings to factory.

⚠️ Attention: On Redmi 9T s MIUI Global Enable the Allow Unlock Option OEM It automatically resets after 72 hours without an internet connection. If you plan to unlock the bootloader, do so immediately after activating the function.

How to turn off developer mode on Redmi 9T

If you no longer need the developer features, you can deactivate them in two ways:

Method 1: Through settings

1. Go to Settings → Additional → Developer settings.
2. In the upper right corner, tap the on/off switch.
3. Confirm the disconnection in the dialog window.

Method 2: Resetting the Settings application data

This method will reset all settings (including Wi-Fi, Bluetooth, etc.), but completely remove the developer mode:

1. Open Settings → Applications → Application Management.
2. Find the Settings app (cog icon).
3. Select Warehouse. → Clear the data.
4. Reboot your smartphone.

⚠️ Note: After resetting the Settings app, you will have to reconnect to Wi-Fi networks and adjust your fingerprint/face. Use this method only if the first option did not work.

Frequent problems and their solutions

Even after the developer mode is turned on correctly, Redmi 9T users are faced with typical errors, and here are the most common ways to fix them:

If after turning on the developer mode, the smartphone began to brake or overheat, check:

• 🔥 Not activated option Do not turn off the screen while charging.
• ⚡ Whether compulsory use is included GPU.
• 🔄 Is there a limit to background processes without restrictions.

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On the Redmi 9T with MIUI 13+, some options (such as Background Check) may be missing. This is not a mistake - Xiaomi removes unstable features in new firmware versions.

FAQ: Answers to Frequent Questions