Personalizing the smartphone interface is not just a whim, but a way to instantly recognize the caller. Owners of Xiaomi, Redmi and Poco devices often face a situation where only a small round icon is displayed on an incoming call instead of the expected full-screen image, a limitation of the standard MIUI shell or the new HyperOS, which, however, is easily bypassed by the correct configuration methods.
Unlike many other manufacturers, Xiaomi does not simply stretch any picture to the full call screen through a standard “bell ringer.” The system artificially narrows the view area to a square or a circle so as not to block the call control buttons. Properly installing a photo requires understanding how the Android operating system handles contact thumbnails.
In this article, we’ll break down all the nuances, from basic Google sync techniques to advanced third-party call launchers, learn why photos are cropped, how to fix black fields, and which apps are really safe to use in 2026-2026.
Why a photo doesn’t stretch across the entire screen by default
The main reason why users can’t immediately put photos on the full screen is because of the logic of the standard Phone app. MIUI developers prioritize the readability of the name and the availability of reset or hands-free buttons, so the center of the screen is reserved for information, not for graphical content.
There is also the problem of proportions: Modern smartphones have 20:9 or 21:9 aspect ratios, while most of the photos in the gallery are 4:3 or 16:9. When you try to stretch this image, the system either cuts the edges, adds black stripes, or compresses the photo into the center, leaving voids.
⚠️ Note: The standard Xiaomi gallery, when you install a photo on the contact, automatically frames the image into a square. Trying to “cheat” the system by simply selecting a large picture will not give a result without preprocessing the file.
It's also worth considering the shell version. In HyperOS, avatar compression algorithms have become more aggressive than MIUI 12 or MIUI 13. This is done for the speed of the interface, but it degrades the visual experience for those who want to see Caller ID at full size. Understanding these limitations is the first step to successfully overcoming them.
Basic method: Installation via Contacts and Google
The most reliable way to work consistently on all models, including the budget Redmi Note series and the flagship Xiaomi Mi, is to properly link the image to the contact in the system ledger. SIM-card or local phone storage, as synchronization provides high resolution thumbnails.
You first need to open a standard Contacts or Phone app and go into the editing mode of the record you want, and the key is to select the original file, and the system will suggest cropping the photo, and that's where many users make the mistake of choosing too small an area.
☑️ Correct contact setting
After saving the changes, it may take time to sync. If the photo doesn't show up right away, try Settings → Apps → All apps → Contacts → Memory and click Clear Cache. This won't delete your numbers, but will force the phone to reload the current avatars from the cloud.
- 📸 Open the Contacts app and find the required entry.
- ✏️ Press the edit button (usually the pencil icon).
- 🖼️ Select a camera icon or photo to upload an image from the gallery.
- ✅ Save the changes and make sure the contact is linked to your Google account.
Use Google Contacts for maximum quality
Xiaomi’s standard “calling” sometimes conflicts with its own graphics processing algorithms. The best solution for cross-platform and high display quality is to use the native Google Contacts app, available on the Play Market and often pre-installed on global firmware versions.
The advantage of this method is that Google uses its own servers to store avatars in high resolution, and when you receive a call, the system accesses the Google cloud rather than the local thumbnail, which allows you to display the picture more clearly and, in some cases, take up more space on the lock screen.
To use this method, you need to install the application by default. Go to Settings → Apps → All Apps → Three dots in the corner → Default Apps → Phone and select Contacts from Google. After that, all calls will be processed through the Google interface, which is more loyal to full-screen images.
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Use photos in vertical orientation (portrait) with a resolution of at least 1080x1920 pixels for the best result on modern Xiaomi screens.
However, it is worth remembering that replacing a standard caller can change the usual dialing interface. If you are critical of the design of your native MIUI, this method may seem redundant, but for photo quality it is perfect.
Advanced method: third-party applications for calls
If the built-in tools do not meet the requirements and you want to see a really full-screen photo with beautiful animations, you will have to resort to third-party software. The market offers dozens of solutions, but not all of them are compatible with aggressive battery optimization at Xiaomi.
One of the most popular and proven solutions is the Truecaller app or special call launchers like CU Dialer, which completely replaces the incoming call interface, allowing you to customize themes, button transparency and, most importantly, the mode of displaying photos.
| Annex | Full screen mode | Advertising | Compatibility with MIUI |
|---|---|---|---|
| Truecaller | Yes (partially) | Got it in | Tall. |
| CU Dialer | Full screen | No. | Medium |
| Call Screen Theme | Yes. | There is. | Tall. |
When installing these apps, Android will ask for multiple permissions, such as access to contacts, call logs, phone and display over other windows, without all of these permissions, the app will not be able to intercept the incoming call and show its design.
⚠️ Warning: Be careful when installing little-known calls. They have access to all your conversations and contacts. Use only proven high-ranking apps on Google Play.
Once installed, you need to go to the settings of the app itself and select the theme “Photo” or “Full Screen.” It is also important to turn off the energy savings for this application in the phone settings, otherwise the system will kill the call process and you will see a standard boring screen instead of a beautiful photo.
Setup of permissions and eliminate black boxes
A common problem that users face after installing a photo is the appearance of black bars on the top and bottom or on the sides, which is due to the discrepancy between the aspects of the screen and the photo, and this can only be solved by pre-production.
You'll need any photo editor (built into the Xiaomi gallery or a third-party like Snapseed) to fram your photo strictly in proportion to your screen. For most modern Xiaomi models, it's 19.5:9 or 20:9.
Algorithm of action:
- 📐 Open the photo in the editor and select the tool "Cadration».
- 📱 Set the Full Screen aspect ratio or manually set the 9:16 ratio (vertically).
- ✂️ Cut the excess so that the face is in the center, but occupies most of the frame.
- 💾 Keep a copy and it is the one you set up to contact.
Also check the theme settings. Xiaomi’s Themes app sometimes features system themes that force the call screen to change to their design, ignoring your photo. If you’re using a third-party theme, try switching to standard Classic or Default to see if it’s the cause.
The Secret Menu of Engineering Tests
Working with the theme of design and lock screen
It is important to distinguish between the incoming call screen (when the phone rings) and the lock screen (when the phone is lying on the table).
To set up the lock screen in HyperOS and new MIUIs, a separate mechanism is used. Go to Settings → Always on screen and lock screen. Here you can set Wallpaper on the lock screen and select the Slideshow or static photo option, but this will not respond to a specific caller.
To make a photo appear even on a locked screen when you call, you need the caller app to have priority of display. In the lock screen settings, make sure that the "Show Notifications" option is enabled and access is allowed for the Phone app. Sometimes cleaning the theme helps: go to the "Themes" application → Profile → Themes → Reset to standard.
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The main rule: For the perfect display, the photo should be vertical, high resolution and uploaded to a Google contact, not on the Internet. SIM-map.
Remember that some “super wallpaper” or live themes may conflict with the Caller ID display. If nothing helps, temporarily turn off the live wallpaper and check the result.
Solving problems with synchronization and display
Sometimes the photo is installed, but when you call it, you see a gray silhouette or an old image, which is a classic contact cache failure. There's a feature in MIUI that the system can store old thumbnails for a long time in a hidden folder called.thumbnails.
To solve this problem, you can try a forced reboot of the contact service. Go to Settings → Apps → All apps → Contacts, click Clear → Clear Everything. Then the phone will ask you to reconfigure the contact display — select your Google account. This will bring all the data back from the cloud again, updating and photos.
If you use messengers (WhatsApp, Telegram, Viber) for calls, the system settings of the phone do not work on them. Each messenger has its own avatar settings. For example, WhatsApp needs to go to the application settings → Avatar to change the photo that the interlocutor will see, but when the VoIP call arrives, WhatsApp will show the photo that is saved in your phone book for this number.
- 🔄 Check the stability of the Internet connection for synchronization Google.
- 🗑️ Clear the cache of the “Phone” and “Contacts” application».
- 📲 Make sure the contact is the correct number with the country code.
- 🔍 Check if the contact is hidden in the display settings.
In rare cases, the problem may be in the image file format. Xiaomi is best at "friending" the JPG format. If your photo is HEIC (from iPhone) or WEBP, convert it to JPG before you set it up for contact to avoid compression artifacts.