Full screen photo when calling Xiaomi Poco X3: full setup

Modern smartphones like the Xiaomi Poco X3 offer users a wide range of personalization options, and one of the most popular features is to install your own image on the incoming call screen. However, many owners find that once the image is installed, it is either cropped or displayed with black fields, not occupying the entire display area, often due to the features of the MIUI operating system and the resolution of the device screen.

The problem of scaling the image is solved not only by choosing the right file, but also by correctly adjusting system parameters. The standard installation mechanism may not take into account the 20:9 aspect ratio characteristic of the Poco X3 NFC and Poco X3 Pro display. As a result, the user sees only the central part of the picture or a small photo in the environment of a blurred background. Understanding the technical nuances avoids disappointment and get the desired visual effect.

In this guide, we will take a look at all the ways you can set up a full-screen photo, how to prepare an image, what settings are hidden in the developer menu, and what third-party apps can help if standard methods don’t work. Following the instructions will help you personalize the communication process and make using your smartphone more enjoyable.

Technical features of the Poco X3 display

The screen of the Xiaomi Poco X3 smartphone has a resolution of 2400x1080 pixels at an aspect ratio of 20:9. It is an elongated format that is significantly different from the classic 16:9 or 4:3 used in older phones. When you upload a regular photo taken on the camera in standard mode, the system often automatically crops it in the center, cropping important details from above and below.

To properly display the full screen, you need to consider the pixel density and physical boundaries of the call interface. MIUI The avatar or call background is limited by software. If the image doesn't match the required proportions, the system's algorithms compress or stretch.�They are stained, or they are empty, or they are empty.

It's important to understand that a system phone and apps like Viber or WhatsApp can handle background images differently. While a native call strictly follows system guidelines, instant messengers often have their own call settings, so setting up may require a customized approach for each application.

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Use images with a resolution of at least 2400x1080 pixels to avoid pixelation on a bright IPS display.

• 📱 The screen aspect ratio is 20:9, which requires specific framing.
• 🖼️ The 4:3 standard photo will be cut automatically.
• ⚙️ The call interface has fixed areas for response and reset buttons.

Preparation of images of the correct proportions

The first and most important step is to prepare the original file. Don't rely on automatic scaling, as it rarely gives the perfect result. You need to manually resize the image or crop it to the proportions closest to the screen of your Poco X3.

Use any built-in gallery editor or third-party photo processing app. Select the "Cadrage" function and set the user aspect ratio. The optimal value is 20:9 or close to it 19.5:9. If the editor does not have such presets, focus on visual filling of the space, leaving minimal reserves at the edges.

⚠️ Note: Do not use low-resolution images (less than 1,000 pixels on the short side) as they will appear blurry and fuzzy on a high-pixel density display.

After framing, you should save a copy of the original, which will allow you to go back to the source if the zoom result does not suit you, and it is also worth checking what the photo looks like in the gallery preview - if it occupies the entire screen without fields, then the file is ready to install.

Installation of photos through the standard MIUI interface

The easiest way to install an image is to use the built-in MIUI shell functionality. This method does not require root rights or additional software installation, but has its own scaling limitations. The algorithm is simple, but requires care during the confirmation phase of the display zone.

Open the Contacts or Phone app and find the person in the list. Click on their name to go to the contact card. In the top right corner or in the menu (three dots), select the Change option or click on the camera/photo icon if visible.

The system will tell you to choose the source of the image: take a photo or choose from the gallery. After selecting the prepared file, the editing interface will open. It is critical to zoom in correctly. When you move the zoom slider, get the face or object to occupy the center part, but fill the maximum area.

Once confirmed, the system will apply the changes, and now when you call in, you should see the image installed, and if it still looks small, move to the next section, which describes more advanced customization methods.

Setup through the developer menu and debugging

For users who want to have full control over the display of interface elements, there is a hidden developer menu, which can find options that affect the scaling. UI-However, be careful: changing system fonts and sizes may affect the performance of other applications.

To activate the menu, go to Settings → On the phone and press quickly 7-10 once under the heading “Version” MIUI". After the message “You became a developer” appears, go back to the main settings menu and select “Additional settings" → "For developers".

In the list of parameters, find the section related to scaling, we are interested in the item "Less width" (or similar DPI settings), changing this value can affect how the system renders contact images, and you need to experiment carefully, fixing the original value, in order to return everything back.

Changing the DPI (dots per inch) can cause the photo to take up more space, but the call control buttons can shift or become too small, a technique that is suitable for advanced users who understand the risks.

Use of third-party applications for calls

If a standard Xiaomi call doesn’t work, Google Play Store apps are a great alternative, often with more flexible theme settings and full-screen photo settings without complex system manipulation.

One of the popular solutions is the Truecaller application or specialized dialers like EX Dialer. Once you install this application, you need to assign it to the default application to make calls. This is done through the system settings in the "Applications" section" → "By default".

Inside the third-party app, you'll find a "Themes" or "Call Wallpaper" section, where you can upload any image and it will be displayed on the full screen, ignoring the system limitations of MIUI. In addition, such applications often offer video calls instead of static photos.

⚠️ Warning: When installing a third-party call, make sure you give it all the necessary permissions to access contacts and phone, otherwise it won’t be able to display callers names.

Solving blackfield problems and quality

A common problem is that there are black bars on the top and bottom of the image, even after all the settings, because the Phone system app has reserved space for the control buttons and number information. APK-file-impossible.

But you can visually hide the fields using smart framing, so you can leave blurred copies of the central part of the photo at the edges (top and bottom), or just black background tone to the interface, and this creates the illusion of a solid picture.

Also check if the system includes the "Enlarged Font" or "One-Hand Mode", which can compress the usable area of the screen. → The screen can free up extra space for the photo.

• 🔍 Check the scale settings in the developer menu.
• 🎨 Use caller apps for full control of the topic.
• 📐 Pictures based on the location of the response buttons.

Frequently Asked Questions (FAQ)

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To achieve the perfect result on the Poco X3, it is best to prepare an image with a ratio of 20:9 in advance and use it through a standard contact editor, avoiding third-party call launchers if they are not functionally required.