Owners of modern smartphones often face an aesthetic mismatch when an incoming call does not occupy the entire display. Xiaomi Poco X3, with a high-quality screen with a high pixel density, can default to display standard avatars in the form of small circles or squares with black fields. This not only spoils the visual perception of the interface, but also prevents the rapid identification of the caller if the photo is cropped unsuccessfully. Solving this problem requires a comprehensive approach, since the standard settings of the MIUI shell do not always offer an obvious “stretch to the entire screen”.
The problem with scaling contacts is that Google’s system caller and the Contacts app are pre-installed on the Poco X3. These programs are optimized for universal use on thousands of models, so they don’t always correctly take into account camera cutouts or the aspect ratio of a particular display. To make the system display the picture as high as possible, the user will have to resort to third-party tools or manually edit media files before downloading them to the phone book.
In this guide, we will take a look at all the available methods for achieving the Full Screen Caller ID effect. We will look at the use of specialized applications from the Play Market, manual image preparation with respect to screen resolution and hidden system settings. Attention: some methods may require additional permissions, which is normal for interface personalization.
Why a photo doesn’t stretch across the entire screen by default
The main reason contact images look small or cropped is because of Google account sync standards.When you save a number to the cloud, the system compresses thumbnails for fast data transfer, sacrificing quality and size. Also, the standard Google Phone dialing interface installed on Xiaomi Poco X3 has a fixed display pattern that prioritizes call management buttons rather than showing a photo.
Another factor is the resolution of the original file. If you upload a photo taken to the front camera a few years ago, its resolution may be too low to stretch onto the Poco X3's 6.67-inch screen without losing quality. The system automatically adds blur or black fields to fill the empty space, but it often looks sloppy. The key here is understanding that the source must be of high quality and the right vertical format.
Also consider the features of the MIUI shell. In some versions of the firmware, the themes of the design can conflict with the standard phone application, forcing your avatar display settings. If you use a third-party theme from the Mi Themes store, try switching to the standard theme "Classic" or "No Limits" to see if the interface behavior changes when you call.
⚠️ Attention: Installation of third-party applications for number determination and Caller ID This may result in your phone book being transferred to developer servers. Use only proven high-ranking programs and read the privacy policy carefully before providing access to contacts.
Understanding these limitations helps you choose the right strategy, and it's often impossible to simply turn on the full-screen switch in your phone settings, so we're moving on to practical ways to solve the problem.
Image Preparation: Format and Resolution
Before you install the program or change the settings, you need to prepare the graphics file itself. The screen Xiaomi Poco X3 has a resolution of 2400×1080 pixels and an aspect ratio of 20:9. To make the photo look perfect when incoming, it must correspond to vertical orientation and have sufficient density of points. Horizontal pictures will have to be framed, losing part of the image on the sides.
The best solution is to use photos in portrait orientation with a resolution of at least 1080×1920 or higher. If you take photos from social networks, they are often compressed, so it is better to download the original through the full version of the site or ask the interlocutor to send a file without compression. The processing of the image in the editor will align the balance of the face in the center, which is critical for the correct display in a round or rectangular frame of the call.
You can use the built-in MIUI gallery editor or more advanced tools like Snapseed to edit, and it's important to get the extra details off the edges, because they can be cut off by the interface, and remember, the more contrastful and sharp the face in the photo, the better it will read even with a quick glance during the call.
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Use the Portrait feature when taking a new photo for contact. Bokeh helps to highlight the face and makes the image more professional when displayed on the full screen.
After preparation, save the file in JPG or PNG format. PNG is preferable if the image has transparent areas or complex graphics, although for facial photos the difference is almost invisible. Now that the file is ready, you can move to the methods of installing it.
Use Full Screen Caller ID application
The most reliable way to get Xiaomi Poco X3 to show photos to the full screen is using specialized software, the leader in this niche is the application Full Screen Caller ID - FSCI, which completely replaces the standard incoming call window with its own, allowing you to use any image in high resolution.
Once installed and launched, the program will request a number of critical permissions: You will need to provide access to the phone book, microphone, camera and, most importantly, allow mapping on top of other applications. Without the last item, the MIUI system will simply block the appearance of the custom call window, and you will need access to the storage to upload photos of contacts.
- 📱 Download the Full Screen Caller app ID Google Play Store.
- 🔐 Provide all requested permissions, including “Over Other Windows».
- 👤 Allow synchronization with your Google contacts or SIM-map.
- 🎨 Select the display style (circle, square, full screen) in the theme settings.
In the app settings, you can choose the display mode "Full Screen" or "Portrait". In the first case, the photo will occupy 100% of the display area, in the second case, it will be inscribed in a given template. For the Poco X3, it is recommended to choose a full screen mode with the possibility of zoom, so that the user's face is clearly visible even in the horizontal position of the phone.
⚠️ Note: After installing the app, the Android system can periodically close it to save battery. FSCI Set up a “No Limits” or “Autostart” mode so that calls are always displayed correctly.
The main advantage of this method is full customization, you can add captions, change fonts, and even put a video instead of a static photo, but it's a third-party solution that consumes a little more CPU resources than a system call.
Configure via Google Contacts and Gallery
If you don’t want to install additional apps, you can try to improve the situation with standard means by assigning a photo correctly in the contact profile. The algorithm of actions on Xiaomi Poco X3 has its nuances due to aggressive optimization of MIUI.
Open the Contacts app first (system, orange or blue, depending on the topic). Find the number you want, click Change and select the current photo. Here, you need to choose the option Take a photo or Choose from the gallery, but not rely on automatic cropping. The system will suggest framing the image - spread the frames as wide as possible, capturing the area around the head, as when ringing the edges may be clipped.
☑️ Checklist of correct contact setting
Once you have your photo in contact, check if it has synced with your Google account. Sometimes MIUI only saves the photo locally on your device and when you reset the settings, it will disappear. For forced sync, go to Settings → Accounts and Sync → Google and make sure Contacts is active. Click on three dots in the corner and select Sync.
There is also a hidden trick to assign a photo through the Gallery: Open the desired image in the MIUI gallery, click More (three dots) → Assign → Contact. This method sometimes allows you to bypass the limitations of the contact editor and upload the image to the original size, which the system will then try to adapt itself.
| Method | Photo quality | Difficulty | Impact on the battery |
|---|---|---|---|
| Full Screen Caller ID | High (HD/4K) | Low. | Average. |
| Google Contacts | Medium (compressed) | Low. | Minimum |
| MIUI themes | Depends on the topic. | Medium | Low. |
| Truecaller (Premium) | High. | Low. | High. |
This method is the safest for system stability, but does not guarantee 100% screen filling without black fields, especially if the original photo is not perfect in proportion.
Alternative MIUI applications and themes
Another solution is to deep customize the interface through the theme store. MIUI Themes offers hundreds of free and paid themes that completely change the design of the lock screen and incoming call windows, some of which are originally sharpened to display large avatars.
When searching for a theme, use the keywords “Big Photo”, “Full Screen Call” or “Minimalist”. Before installing, be sure to check the screenshots in the theme description – it usually shows what the call screen looks like. After applying the theme, you may need to reboot your smartphone to correctly display all the elements.
Why can topics not work?
And then there are powerful harvesters like Truecaller, which is primarily known as the number detector, but its premium version has a Caller ID feature that also displays photos on the full screen, plus that the photo database is automatically updated from social networks if users upload their data to it.
However, Truecaller is considered a heavy application that can slow down budget devices, although Poco X3 with a Snapdragon 732G processor should cope without problems.
Solving Display and Synchronization Problems
Even after you set it up correctly, you may find yourself in a situation where the photo doesn't show up or shows a gray silhouette. First of all, check the phone and contact permissions. In MIUI, this is done through Settings → Apps → All apps → Phone → Rights. Make sure that access to contacts and storage is allowed.
A common problem on Xiaomi is that the cache is cleaned by the system. If you notice that photos are missing after rebooting, it's possible that the aggressive energy-saving mode has killed the sync process. Try clearing the cache of the Contacts app manually and running the sync again. Also helps switch the type of storage contacts: if they are saved on the SIM-Please transfer them to your Google account because SIM-The card does not support the storage of high quality images.
If you use a third-party call, make sure it is installed as the default app for making calls. This is checked in the Settings menu → Apps → App management → Three dots on the top right → Default apps → Phone. If it is System and you set up FSCI, the feature won’t work.
⚠️ Warning: When you reset your phone to factory settings, all locally stored contact avatars will be deleted. Always keep important contacts in your Google account so that they automatically pull up with photos after resetting.
In some cases, updating Google Play Services and the Google Phone app itself through the Play Market helps. Older versions may not properly handle new image formats or screen resolutions relevant to the Poco X3.
FAQ: Frequently Asked Questions
Why is the contact photo shown in black and white when you call?
Can I put a video instead of a photo when calling Poco X3?
Do contact photos disappear after MIUI update?
How to take a full screen photo for unknown numbers?
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The most stable result on Xiaomi Poco X3 gives a combination of high-quality vertical photos in Google contacts + Full Screen Caller ID application with autorun permission.
To sum up, it takes a little effort to set up a full-screen photo on Xiaomi Poco X3, but it's worth it. Personally, I recommend starting with quality shots, as this is the basis for any method. If standard tools don't meet your aesthetic needs, installing a dedicated application will solve the problem dramatically.