How to use the level on the phone Xiaomi

Many Xiaomi smartphone owners are unaware that they have a precise building tool in their pocket to replace the expensive bubble level. Owners of Redmi and Poco devices often look for third-party applications in the Play Market, not knowing that the system functionality already contains everything you need for everyday tasks. The built-in layer is not just a toy, but a useful utility built directly into the shell of MIUI or HyperOS.

Using an accelerometer and a gyroscope, you can achieve high precision when you align paintings, when you install shelves, when you assemble furniture, you don't have to buy a separate device for a one-off housework, you just have to know where to look for this feature in the system and how to calibrate it correctly to get reliable data.

In this guide, we will look at how to activate hidden menus, how to calibrate sensors and how to use them in different scenarios. Level sensors are built into every Xiaomi device, but access to them is often hidden inside the Compass app.

Where to find a tool in MIUI and HyperOS

Searching for the built-in layer can be a real quest for a beginner, since Xiaomi does not display a separate Level icon on the desktop by default. The functionality is integrated into the Compass system application, which is preinstalled on all global and Chinese firmware versions. To access the toolkit, you need to open the Tools folder or search the system.

When you start the Compass application, you'll see a standard interface with the cardinal points, but it's not just navigation, but if you look at the bottom of the screen or the side faces of the interface, you'll notice a mode switch or a hidden button to activate additional functions. Some versions of the shell require a swipe left or right to change the mode of the sensors.

If standard methods fail to find the level, you may have a stripped down version of the application or a regional build with restrictions, in which case it is worth checking for updates in the GetApps store or Google Play. Sometimes the function is activated only after the initial calibration of the main compass module.

⚠️ Note: Some global firmware versions may have the level icon hidden by developers to keep the interface minimal. If you can't see the switch, try turning the device into horizontal mode.

For users who are used to pure Android, MIUI may seem overloaded, but it is this integration that saves battery life without running single heavy applications. The system layer works directly with hardware, bypassing unnecessary software layers.

Instructions for activation and first start

When you start the app, you're taken to the home screen. To switch to measurement mode, you often need to perform a specific action that is not obvious at first glance. In most current versions of MIUI 12, 13, 14 and the new HyperOS, you need to click the menu button (three dots or a hamburger) in the corner of the screen or swipe on the bottom panel.

In the list that opens, select Level or Level. The interface will change instantly, with a virtual bubble similar to a physical tool and numerical deflections in degrees. The color indication will tell you status: green means perfect horizontal or vertical, red indicates the presence of deviations.

The first run may require permission to use motion sensors. Android security may request confirmation of access to the accelerometer. Permission is mandatory, otherwise the tool will show static or incorrect data. Without this step, calibration is also impossible.

Some users prefer to display a level widget on the desktop for quick access, by pressing the blank space on the screen, selecting "Widgets", finding the "Compass" and dragging the desired element, which will eliminate the need to open the entire application every time.

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For quick access, add the Level widget to your desktop or lock menu if your shell version allows you to customize the lock screen.

Calibration of sensors for accurate measurements

The accuracy of the readings depends on the state of the magnetic sensors and the accelerometer. Over time or after a fall, the data can get lost, which leads to errors in measurements. Calibration is the process of bringing sensor readings to reference values, which takes only a couple of minutes.

To begin the procedure, place your smartphone on a perfectly flat horizontal surface, whether it's a glass table or a proven building level. In the Compass app, find the Calibration button (often marked with the letters "CAL" or a target icon) Follow the instructions on the screen: you usually need to turn the device in space, describing the eight.

• 🔄 Place your phone on a flat surface with the screen up and wait until the first stage is completed.
• 🔄 Turn the device downward and repeat the procedure if the system requests calibration of the second axis.
• 🔄 Perform the motion of the “eight” in the air to retrain the magnetic sensor.

It is important to calibrate away from the magnetic radiation sources. Metal structures, speakers and transformers can distort the tuning process. If after calibration the level bubble continues to walk on a flat surface, repeat the procedure in another room.

⚠️ Note: Do not calibrate near powerful magnets or electric motors, which can lead to irreversible magnetization of smartphone components or failure of the compass.

Modes of operation: Horizon and Vertical

Modern Xiaomi smartphones are able to determine not only horizontal plane, but also vertical position, which is especially useful when gluing wallpaper, mounting door jambs or mounting a TV on the bracket. Switching between modes usually occurs automatically when you turn the device, but may require manual selection on the menu.

In vertical mode, the phone acts as a plumb. The screen shows a deviation from a strictly vertical line. The digital values in degrees allow you to estimate the error when the visual bubble is not enough. The green zone activates when the deviation is less than 1-2 degrees.

There's also a combined mode that displays all three axes (X, Y, Z) -- a professional interface that's useful for complex engineering tasks, and here you see a forward-back-up, left-right, and rotation around your axis at the same time.

Using the transporter mode, you can measure the angles of the surfaces, just put the face of the phone on the plane you're measuring, and the digital readings will be updated in real time, which is more convenient than looking at the scale of a mechanical tool.

Use of the level in construction and household

Despite being compact, the phone can solve 90 percent of household tasks. When you install the washing machine, put Xiaomi on the top of the unit. Adjust the legs of the machine until the indicator on the screen turns green. This will ensure silent operation and no vibrations when pressed.

When you hang pictures or mount a TV on a wall, use vertical mode. Put a long face of your smartphone on the wall or on the object itself. If you want high accuracy, you can use the "reference points" method: mark the position of the bubble at one end with a pencil, then move the phone and match the bubble with a mark.

• 🔨 Use a long flat object (rule or board) as a phone extension to cover a large area.
• 🔨 Rub the camera and back panel before use to avoid skewing due to dust or cover.
• 🔨 To measure angles in hard-to-reach places, use the screen recording mode, so that you can then carefully study the readings.

But you have to remember the physical limitations, because the length of the smartphone body limits the base of measurement, because you can't check the level of the floor over a large area, because you need a long building layer, and it's good for local accuracy, but not for the global geometry of the room.

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The smartphone is ideal for fast household tasks, but for professional construction of long structures (more than 1 meter) it is better to use a specialized laser or bubble tool.

Frequent problems and ways to solve them

The main problem that users face is the "floating" readings, the bubble shaking or slowly shifting without changing the position of the phone, most often due to a software glitch in the sensors or background processes that load the processor.

Try rebooting the device. It's a trivial but effective method of resetting temporary accelerometer errors. If the problem persists, check for a protective case. Massive cases with metal inserts or magnetic latches can shield the sensors.

In rare cases, there is a hardware malfunction. If the phone fell, the sensor module could be damaged. You can check this in the engineering menu. Type the code ##6484## in the call app. Select the "Sensor" option and check the acceleroométor's response to tilts. If the graph is not built or behaves chaotic even after calibration, there is a possibility of failure.

⚠️ Warning: If the engineering menu shows sensor error, software calibration won't help.

Temperature is also important, because when the body is heated (e.g., while playing or charging), the sensor readings can be temporarily distorted, and let the device cool down before making accurate measurements.

Frequently Asked Questions (FAQ)