Application Brach on Android, what is needed for Xiaomi

Xiaomi, Redmi and Poco smartphone owners often see a standard app called Mi Key as installed on their list, which many users ignore as system junk or accidentally delete without realizing its real purpose. However, this component is an important part of the MIUI and HyperOS ecosystem, providing quick access to frequently used features without having to unlock the screen or search for icons on the menu.

The idea behind the app is to create virtual or physical triggers to instantly trigger actions, such as launching a camera, turning on a flashlight, paying through NFC, or even calling an emergency service. Understanding how this tool works allows you to turn a regular smartphone into a more functional device controlled by a single touch or a combination of buttons.

In this article, we will discuss in detail why the application is necessary on Android devices from Xiaomi, how to properly configure it to your needs and what hidden opportunities it opens up for increasing productivity. We will look at both the software part and interaction with hardware buttons, as well as discuss security and optimization of the system.

The main purpose of the application is a keychain in the MIUI system

The Mi Key app was originally designed as a software interface for a physical accessory, a smart button that connects through a headphone jack. Over time, with the disappearance of the 3.5mm jack in modern smartphones, the functionality migrated to the software environment using the device's built-in sensors and buttons. It is now a universal launcher for quick action that is deeply integrated into the operating system.

The main goal of the program is to reduce the path of the user to the desired function. Instead of unlocking the phone, looking for the Calculator app or the Recorder, you can set the launch of these tools for a certain action, which is especially true for situations where hands are busy or an instant reaction is required, for example, when taking a photo or recording an important conversation.

It also serves as a control center for automation, and it allows you to create scenarios where one action triggers a chain of processes, such as connecting headphones to automatically turn on a specific playlist and turn up the volume, and triple pressing the power button to send location coordinates to a trusted contact.

• 🚀 Instantly launch applications without logging into the menu.
• 🔦 Quick access to system utilities (flashlight, screenshot).
• 🎛️ Set up automation scenarios for different situations.
• 🔒 Increased security through fast teams SOS.

⚠️ Note: Removal of the system application "Brelok" through ADB Third-party managers may cause unstable fast access functions and disrupt some system scripts in the HyperOS shell.

Functionality and use cases

The modern version of the app offers a wide range of settings that go far beyond a simple shortcut. The user can assign different actions to single, double or triple pressing of volume buttons, as well as long-term clamping, which turns the side face of the smartphone into a powerful control tool.

One of the most useful features is the ability to create smart shortcuts. You can customize the app so that when the screen is off, double-pressing the volume button "up" takes a picture, and triple-pressing "down" includes a voice recorder, which is especially convenient for journalists, students or photographers who need to quickly capture the moment.

The app also supports the work with NFC-If you have physical marks. NFC, You can tie them to certain actions through Brelock's interface, for example, touching a phone to a desktop tag can put the device into Do Not Disturb mode and run podcasts, and a tag in the car can turn on Bluetooth and the navigator.

For those who travel or are on the road often, the function of launching navigation or broadcasting the screen on a short command is useful, which eliminates the need to search for the appropriate items in the “curtain” of notifications or the main menu, which is especially important when controlling one hand.

Customizing buttons and creating shortcuts

The application configuration process is intuitive, but requires attention to detail. To start, you need to open the settings through the Settings menu → Additional Features → Fob (the path may vary slightly depending on the version of MIUI).

The system will first suggest the activation method. You can use volume buttons, which is the most popular option, or set the start to touch the back panel (if supported by the model) or use NFC. For volume buttons, there are three reaction modes: single, double and triple press.

After choosing the type of interaction, a list of available applications and system functions is opened, and you can choose to launch a specific application, execute a system command (for example, a screenshot), or go to a specific settings section.

Special attention should be paid to setting up the lock mode. By default, some commands may not be executed if the screen is turned off to prevent accidental starts in the pocket. In the application settings, you must explicitly allow the performance of actions "When the screen is off" for critical functions such as a flashlight or camera.

Working with physical accessories and NFC

Although the era of physical Mi Key buttons for the 3.5 mm connector is over, the principle of working with external triggers has remained relevant thanks to NFC technology. Xiaomi smartphones are equipped with short-range contactless modules that can read special tags.

To implement this scenario, you will need programmable NFC-The setup process is this: you create a new script in the app, you select the "Run upon Detection" action. NFC-tags, and then bring the phone to a clean label to write a unique identifier on it.

This opens up the possibility of creating a smart home without the use of complex hubs. Put a label at the front door: touching the phone will turn off the lights (if the smart lamps are set up), set the alarm at 7:00 and turn on the “Do not disturb” mode.

⚠️ Attention: When recording NFC-Make sure that other important information is not written on them (for example, office access keys), since the process of binding to the application of the Bralock can overwrite existing data on the chip.

Hiding the application and security issues

Because the Keychain app allows functions and applications to run even from a locked screen, security issues arise: If a phone falls into the hands of an attacker, he could theoretically access a camera or voice recorder. However, the Android system and the MIUI shell provide protection mechanisms.

First, running most applications from a locked screen will still require unlocking (fingerprint, face or pin) unless the security settings state otherwise. Second, the application itself can be hidden from prying eyes using the built-in Hiding Apps or Second Space feature.

To hide the icon, go to Settings → Apps → Hide Apps and select “Fringe.” After that, the icon will disappear from the desktop, but the functionality will remain active and respond to the assigned buttons. This also helps to keep the interface clean if you are not using the visual part of the program.

If you use quick commands to pay for or access personal data, it is recommended to set up a separate profile or guest mode where these functions will be limited, and do not assign actions to action buttons that require entering a password if the phone is often in the wrong hands.

Impact on autonomy and productivity

One of the frequent questions users ask: “Does the application lock the battery?” because the program runs in the background and constantly “listens” to the state of the buttons or buttons. NFC-But in reality, Xiaomi's current optimization algorithms minimize this consumption.

The app doesn't use CPU time all the time. It only activates when you interrupt (press a button) or scan NFC. The rest of the time it's in sleep mode. Tests show that the impact on autonomy is less than 1% per day, which is imperceptible when social media or navigation is running.

If you notice that the phone starts to run out faster after setting up the scripts, check if there are any action buttons that constantly wake up the screen or use geolocation, and make sure that there is no conflict of processes in the system, which sometimes happens after updating the firmware.

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For maximum energy savings, disable the “Background” option in Bralock settings for those scenarios that you only need when the screen is unlocked.

UI performance is also not affected: App launches through a keychain are faster than through search or desktop, as the number of animations and transitions between lock screens and the desktop is minimized.

Solving typical problems and malfunctions

Despite the stability of the work, users may find themselves in a situation where assigned commands stop being executed, most often because the system has killed the application process to save memory. In MIUI, aggressive memory cleaning is a known feature.

To fix this, go to Settings → Apps → All Apps → Brelok → Battery and select No Limits mode. It is also recommended to add the app to the autoboot and pin it to the list of recent apps (if such a feature is available in your launcher version).

Another problem is that you have conflict with other button management applications, where if you've installed third-party tools like Button Mapper, they can intercept signals, and you have to choose the priority application or remove the conflicting software.

• 🔄 Check for app updates in the GetApps store.
• 🔋 Make sure that the energy saving mode does not block the work.
• 🚫 Disable third-party launchers to check compatibility.
• 📱 Restart the device after making changes to the settings.

If the buttons stopped responding after the system update, try resetting the settings of the application itself via the application management menu.This will return the configuration to factory values and often eliminate software failures.

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The stable operation of Breloka directly depends on the correct energy saving settings in the Android system, and not on the application itself.

Frequently Asked Questions (FAQ)