Use and calibration of the compass on Xiaomi Redmi smartphones

Xiaomi and Redmi smartphones today are equipped with an arsenal of sensors that turn the device into a powerful navigation tool. The built-in magnetometer allows the gadget to determine the directions of the world with high accuracy, which is critical not only for tourists in the woods, but also for ordinary users in urban environments. Many device owners do not even suspect that their phone can work as a full-fledged navigation device without the need to download third-party applications.

The compass function is built directly into the Compass or Tools system application, which is pre-installed on all current versions of the MIUI and HyperOS shell. However, to be reliable and the arrow does not rotate randomly, you need to properly configure the device and periodically conduct a calibration procedure. In this article, we will discuss in detail how to activate this feature, fix positioning errors and use the smartphone as a reliable reference point in space.

It is worth noting that the magnetic sensor can be disrupted by external factors such as metal covers or the proximity of powerful electrical appliances. Understanding the principles of electronic navigation will help you avoid common mistakes and always know where the north is, even if you are in an unfamiliar area of the city or in a dense forest.

Search and run the built-in Compass application

The first step to get started is to find a standard app on your device. On Xiaomi and Redmi smartphones, it's usually in a folder called "Tools" on the home screen or in the menu of all apps. The icon looks like a classic compass with a red arrow pointing north. If you can't find it, use a global search by swiping your finger down your desktop and querying "Compass."

Once the app is launched, you will see a circular scale and movable arrow interface, displaying current coordinates, address and altitude in the center of the screen if geolocation is enabled. The interface may vary depending on the firmware version, but the basic functionality remains identical on all models, from the budget Redmi Note series to the flagship Xiaomi.

It's important to understand that the app uses not only the Earth's magnetic field, but also GPS/GLONASS data to determine your location, so to work properly, you need to provide the device with access to geolocation, without which you will only see the direction of the cardinal directions, but you will not be able to know your coordinates or address.

• 📍 Find the Tools folder on your smartphone’s desktop.
• 🧭 Run the app with the compass icon with a red tip.
• 📡 Allow access to geo-location when the system is first started.
• 🔄 Make sure the sensors are not blocked by a cover or metal object.

If the app is missing, it may have been removed by the user earlier, in which case it can be returned by resetting the launcher settings or installing the official Compass app from the GetApps store, which is the equivalent of Google Play for the Xiaomi ecosystem.

Magnetic sensor calibration procedure

The most common problem users face is incorrect readings or a constant request to calibrate the device, which is necessary so that the smartphone software can accurately match the magnetic sensor data with the actual magnetic field at the current point, without which the error can reach 45 degrees or more.

To do the calibration, open the app and find the setting button, usually located in the corner of the screen or accessible through a three-point menu. The system will prompt you to perform a characteristic hand motion in the air, describing the eight. This motion allows the sensor to record changes in the magnetic field in all planes.

⚠️ Note: Do not calibrate near large metal objects, cars or powerful sources of electromagnetic radiation, such as transformer booths, this will lead to incorrect data and constant malfunction of navigation.

In some versions of MIUI, calibration can be triggered automatically if the system detects severe interference or a sharp divergence of GPS and magnetometer data. The smartphone screen will start flashing, and animation will appear suggesting that you "draw" the eight with the device. Follow the instructions on the screen, turning the phone in different directions until the accuracy scale reaches its maximum value.

Once the procedure is completed successfully, the arrow should stabilize and point exactly north. If the problem persists, try restarting the smartphone, as a temporary failure in the operation of system services can also affect the readings of the sensors.

Configuring coordinates and addresses

In order for the compass to show not only the direction, but also your exact location, you need to properly configure permissions for the application. In modern versions of Android and Xiaomi shells, privacy issues are at the forefront, so access to geolocation is often limited to the background or is only requested when in use.

Go to your smartphone settings via Settings → Apps → All apps. Search in the Compass list and select Permissions. Make sure that access to your location is set to Always or Only When Used, but with the exact location option enabled, allowing the app to receive data directly from GPS, GLONASS and Beidou satellites.

It's also worth checking the navigation system's settings, and in some cases, to improve accuracy, you need to enable Wi-Fi and Bluetooth scanning even when they're off, which helps the phone locate nearby hotspots, which is especially true in dense urban areas.

If the screen displays coordinates but the address is not determined, check for an active Internet connection. The conversion of coordinates to an understandable address (geocoding process) takes place on the servers of the card provider, so without the network, you will only see the numbers of latitude and longitude.

Use of compass in navigation applications

The built-in compass often works in conjunction with popular navigation applications such as Yandex.Maps, Google Maps, or 2GIS. When you build a route, it is the magnetometer data that allows the arrow on the map to rotate according to the direction of your body’s movement, rather than just showing the path line.

In Google Maps, for example, the blue dot that indicates your location has a cone-shaped sector, which is the sector that shows the direction the phone is looking at, and if the sector is wide and blurry, the compass needs calibration, and the narrow and clear sector indicates that the azimuth is very accurate.

Yandex.Navigator also uses a compass to guide the map. By clicking on the compass button in the corner of the screen, you can switch the map display mode: North is always on top or the map turns as you go. The second mode is impossible without a properly functioning magnetic sensor in your Redmi.

For example, some of them can enable GPS Only, which ignores the magnetic sensor, relying only on changing coordinates as you move, but in a static position, when you stand and look for the right direction, it is the orientation sensor built into the phone that works.

Table: Standard and third-party compass capabilities

Users often wonder if it is worth installing third-party apps from the Play Market if the standard one already exists.Compare the functionality of the built-in tool with popular counterparts to understand the difference in approaches to navigation.

As you can see from the table, for most household tasks, a standard application is more than enough, it is devoid of intrusive advertising and perfectly integrated into the HyperOS ecosystem. Third-party solutions can only be needed by professionals who need specific data, such as the level of magnetic declination in microteslas or recording a movement track.

However, if a standard application does not work properly after a system update, installing a proven analog may be a temporary solution to the problem before the patch is released from the manufacturer.

Solving common problems and failures

Sometimes users are faced with a situation where the compass stops responding to the turns of the device or shows a completely wrong direction. The first reason is almost always a software failure of the localization service, in which case a simple reboot of the smartphone helps, which resets the cache of the sensors.

The second common cause is magnetic bookcases with a metal clasp or magnetic holders in the car. The magnet in the holder can magnetize the internal components of the phone, which leads to permanent distortion of readings. If you used a magnetic holder, after it is removed, it may take several calibration cycles to restore normal.

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If the compass is buggy after the phone falls, the sensor itself may be damaged. Try running the engineering menu to check: dial ##6484#, select Compass and check the sensor's reaction to the turns.

Problems can also arise from outdated A-GPS data, and to update it, you can use specialized GPS reset utilities that speed up satellite search, which is especially useful if you haven't turned on geolocation in a long time or moved a long distance with your phone off.

⚠️ Note: If neither calibration nor reboot helps, and the sensor does not respond in the engineering menu, there may be a physical breakdown of the navigation module, which requires contacting the service center.

Frequently Asked Questions (FAQ)

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Regular calibration and the absence of magnetic interference is the key to accurate navigation on your Xiaomi Redmi in any situation.