Setting up screen resolution on Xiaomi: from smartphones to Smart TV

Setting the resolution of the screen on Xiaomi devices is a key point for comfortable use of the gadget. Incorrectly selected parameters can lead to blurred images, disproportionate interface elements or even overheating of the device. In this article, we will examine all the nuances from the basic settings on smartphones with MIUI 14/15 to fine calibration on Xiaomi TV and Redmi Display monitors.

Xiaomi devices are flexible in their display settings, but not everyone knows where to look for the options they need. For example, some smartphone models (such as the Xiaomi 13 Ultra or POCO F5) offer automatic resolution changes in games, while Mi TV Q2 TVs can manually zoom in for external sources. We will look at all scenarios from standard settings to hidden features via ADB.

Why it is important to adjust the screen resolution correctly

Screen resolution directly affects picture quality, device performance, and even battery life. For example, on Xiaomi smartphones with a high-end smartphone. AMOLED-displays (such as Xiaomi) 12T Pro) high resolution increases the load on the processor, which can reduce battery life by 15-20%, on the other hand, lower resolution will make text and icons blurry, and the interface uncomfortable to perceive.

On Xiaomi TVs, the situation is even more critical: the wrong resolution when connected via HDMI can lead to cropping images (so-called “overscan”) or black stripes around the edges, especially when watching movies in 21:9 format or playing on Xiaomi Mi TV Stick.

• 🔋 Battery savings: 20% lower resolution can increase smartphone life by 1-1.5 hours.
• 🎮 Game performance: many mobile games (e.g. Genshin Impact or GAME) PUBG Mobile automatically reduces resolution to increase FPS.
• 👁️ Comfort for vision: too high resolution on small screens (less than 6 inches) can cause eye strain.
• 🖥️ Compatibility with external devices: when connecting the smartphone to the monitor USB-C → HDMI manual scaling adjustments are required.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 12 Pro)+) If you manually change the resolution through the engineering menu, you can get the color calibration confused, and you'll need to reset the display settings to the factory.

How to change the screen resolution on Xiaomi smartphones (MIUI 14/15)

On most Xiaomi smartphones, basic resolution settings are hidden in the display menu. However, in the latest versions of MIUI 14 and MIUI 15, the algorithm has changed: now some options are available only through the Developer or special gestures.

Method 1: Standard display settings

This method is suitable for most models, including the Xiaomi 13/13T, Redmi Note 12 and POCO X5:

1. Open the Settings → Display.
2. Select the screen resolution (on some firmwares, the screen size may be called).
3. You will be offered three options: Auto (recommended for most tasks) FHD+ (2400×1080) – the optimal balance of quality and performance HD+ (1600×720) – to save battery power.

Apply

Some models (such as the Xiaomi 12S Ultra) have an additional WQHD+ resolution (3200×1440) available, but it only activates when High Performance is enabled in the battery settings.

Check the current version of MIUI (Settings → About Phone)

Charge your phone at least 30% (reboot will be required if it fails)

Disable the power saving mode (may block changes)

Take a screenshot of current settings (for rollbacks if necessary)-->

Method 2: Through the Developer Menu (for power users)

If standard options are not enough, you can activate hidden settings:

1. Enable Developer Mode: Go to Settings → About Phone. 7 times click on MIUI Version. Enter the password from your Mi Account if needed.

Settings → Additional → For Developers

• Minimum screen width (affects interface scale)
• Secondary display simulation (for resolution testing)
• USB Debugging (required for ADB commands)
• Activate Mode Mode to properly display movies in 21:9 format.
• Activate the Adaptive Resolution option (if available).
• In Xiaomi settings, activate Performance Mode (Settings → Battery → Performance Mode).

For games with support for 90 FPS or 120 FPS (for example, Fortnite Mobile or League of Legends: Wild Rift), it is recommended to use a resolution of 2400×1080 with anti-aliasing disabled.

💡

If the game is very warm smartphone, try to reduce the resolution to 1600×720 and enable the FPS limit at 60 fps. This will reduce the load on the processor and extend the game time by 20-30 minutes.

Xiaomi’s screen resolution issues and their solutions

Even after you set the resolution right, Xiaomi users can encounter bugs like blurry text, incorrect zoom, or black bars around the edges of the screen, and let’s look at the typical problems and how to fix them.

Blurred text and icons after permission change

This problem often occurs when manually setting a non-standard resolution (e.g., 2240×1080).

• 🔄 Return the standard resolution to Settings → Display. → Screen resolution.
• 🛠️ Reset the display settings: Settings → System system → Resetting settings → Resetting display settings.
• 📱 Update the firmware: sometimes scaling bugs are fixed in new versions MIUI.
• 💻 If the problem occurs after connecting to an external monitor, disable the option of Scaling the secondary display in the developer settings.

Black bars on the edges of the screen (Overscan)

This problem is typical of Xiaomi TVs when connected via HDMI.

1. On the remote, press Menu → Settings → Image and sound → Image format.
2. Select Just Scan (no zoom) or 16:9.
3. If the Just Scan option is missing, update the TV firmware.
4. For PlayStation 5 or Xbox, additionally configure the display in the console (in the screen settings menu).

Incorrect display after the MIUI update

Sometimes, after the MIUI update, the display settings are disrupted to get things back to normal.

1. Go to Settings → About Phone → System Update and check the relevance of the firmware.
2. If the update didn’t help, reset your display settings (see above).
3. For advanced users: reset the zoom settings via ADB: adb shell wm density reset adb shell wm size reset

💡

If after changing the resolution, the smartphone began to overheat or discharge quickly, return the settings to the factory. Prolonged work on non-standard resolution can reduce the battery life.

Hidden features and engineering menu for fine-tuning

For power users, Xiaomi offers hidden options for setting the display through an engineering menu or ADB. These methods allow you to set custom resolutions, calibrate colors or even change the pixel density (DPI). However, they require caution - incorrect settings can lead to failures.

Access to the display engineering menu

To open the hidden screen settings:

1. Open the Phone app.
2. Enter the code: ##36446337## (for models running Qualcomm processors) or ##4636## (universal).
3. In the menu that appears, select Display Test or Screen Information.
4. You can: Check the current resolution and DPI, run the broken pixel tests, change the color temperature (if available).

On some models (for example, Xiaomi 11T Pro) in the engineering menu is available option Force FHD, which is forced to set the resolution of 1920×1080 for all applications.

Change in pixel density (DPI) through ADB

The pixel density (DPI) affects the size of the interface elements, so to change it:

1. Connect your smartphone to your PC and activate Debugging via USB.
2. Open the command line and type: adb shell wm density 400 (where 400 is the desired DPI value; the standard for Xiaomi is 440-480).
3. Reset the device.