How to Make a Full Screen Call on Xiaomi: The Complete Guide

The situation when the incoming call is not displayed on the entire screen, but only in the form of a small floating window, is familiar to many users of Xiaomi smartphones. This is a serious discomfort, especially when you need to quickly answer the call or turn off the microphone, and the interface elements are too small. Most often the problem lies in the randomly activated function “floating windows” or malfunctions in the system application “Phone”. To return the usual full-screen format, you need to check several interface and application settings.

With modern MIUI shells and the new HyperOS, the logic of the call may vary depending on the region of the firmware. If you have a global version, the settings can be hidden deeper than in the Chinese build. It is important to understand that Google's standard Dialer app, which is pre-installed on most devices, has its own display features. In some cases, the window size changes occur after updating system components or installing third-party launchers.

Don't panic if the screen suddenly is small. It's not a hardware defect in the display, it's a software feature that's easy to fix. You just need to go through the settings menu consistently to find the switch that blocks the full screen mode. In this article, we'll look at all the possible causes and provide a step-by-step algorithm for returning normal calls.

Causes of a floating window when ringing

The main reason for changing the format of incoming calls is the multitasking feature. Android allows you to run applications in floating window mode so that the user can talk and use other programs simultaneously. However, on Xiaomi smartphones this feature is sometimes activated automatically or by mistake. If you accidentally swiped the wrong way during a conversation, the system could remember this gesture as the preferred format.

Another common cause is the conflict of versions of the Phone app, and after updating Google Dialer or MIUI system libraries, the display settings can get lost, especially on Redmi Note and Poco models, where interface optimization sometimes works poorly, and the design themes also influence: some third-party skins change the standard behavior of system windows, forcibly reducing their size.

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If the problem appears immediately after you install a new theme, try returning the standard design to the Topics menu to check if the bug will disappear.

And there's also Do Not Disturb mode, or special screen modes that can distort the interface, for example, if you have one-handed control mode on, the active windows can shrink for easy access, and checking these parameters is the first step to diagnostics, and it usually takes no more than five minutes to resolve software conflicts, if you know where to look.

• 📱 Accidental activation of floating window mode during a previous conversation.
• 🔄 Conflict after updating the system application "Phone" or shell MIUI.
• 🎨 The influence of third-party design themes that change system styles.
• 👐 Activated One-Hand Control Mode or Special Screen Opportunities.

Set up full screen mode in the phone application

The first place to look for a solution is the settings of the call app itself. The standard Google Dialer, which is used on most modern Xiaomi smartphones, has hidden display options. To access them, open the Phone app and click on the three dots in the upper right corner. In the drop-down menu, select Settings. Here we are interested in the section related to incoming calls.

Inside the settings menu, find a item that might be called Inbound Calls or Display. If you have a version with Full Screen Mode, make sure the switch is activated. On some versions of HyperOS firmware, this option may be hidden under "Advanced." If you see the "Floating Window" option, you have to force it to turn it off. This will return the standard interface behavior.

It’s important to note that on different versions of Android, item names may vary slightly. If you haven’t found an explicit switch, try clearing the app’s cache. To do this, go to the general smartphone settings, select Apps, search for Phone, and click Clear. This action won’t delete your contacts, but will reset temporary files that may have caused the interface to crash.

⚠️ Warning: Clearing the Phone app data can reset the call history on the device itself, but contacts synchronized with the Google account will remain secure.

Floating windows management in MIUI and HyperOS

Xiaomi's shells have a powerful window tool called "Floating Windows," which allows apps to run on top of others, but it's also often the culprit behind a smaller call screen. To manage this, open the Settings of your smartphone and search for the word "Floating."

In the window management menu, you'll see a list of applications that allow this behavior. Find the list "Phone" or "Incoming calls." If there's a checkmark opposite this item or the switch is active, turn it off. This action will prevent the system from running the call interface in a small window, forcibly putting it into full-screen mode. In new versions of MIUI 14 and HyperOS, this item may be in the "Special features" section.

There's also a quick way to switch modes. When the bell comes in and the window is small, try swiping from the top corner of the screen down or tapping a special icon in the corner of the call window. Often there's a menu with options like "Unfold," "Fold," or "Close." Selecting "Deploy" will return the normal view. If the window "sticks" to the edge and doesn't stretch, the problem may be a system bug that requires a reboot.

Resetting and cleaning the cache of system applications

If manual switching of switches didn’t help, you need to do a deeper cleaning. Often errors accumulate in the system that prevent the interface from displaying correctly. First, perform a standard cache cleaning. Go to Settings → Applications → All applications. Find in the list “Phone” (or “Incoming calls” if they are separated).

Click on Memory or Storage and then select Clear Cache. Don't confuse this with Clear All, which will delete your call history. Cache is temporary files and it's safe to delete them. After this procedure, be sure to restart your smartphone. System restart is necessary to make the changes take effect and system processes start again.

In more complicated cases, when the cache doesn't work, you can try resetting the display settings through the engineering menu, but this requires caution. A safer method is to remove updates to the Phone app. Go to the Google Play Market profile, find the Phone app and click Delete. The system will roll back to the factory version of the call, which is guaranteed to work in full screen, and then you can upgrade again through the store.

• 🗑️ Cleaning the cache removes temporary files causing crashes.
• 🔄 Update rollback returns stable factory version of app.
• 📲 Rebooting the device is mandatory after any manipulation of system files.
• ⚙️ Resetting the interface settings in the “Additional” section can solve the problem.

⚠️ Note: When removing system application updates, make sure you have a stable internet connection to re-download the current version.

Problems with design themes and third-party launchers

Customization enthusiasts often find that the theme installed disrupts standard windows. Themes in the MIUI Themes store may have bugs or may not be fully compatible with your firmware version. If the call becomes small immediately after changing the wallpaper or icons, the problem is almost certainly the topic. The solution is one - temporarily switch to a standard theme "Classic" or "Default".

Additionally, some users install third-party launchers (Nova Launcher, Lawnchair, and others) to change the desktop look and feel.These launchers can conflict with Android system windows, especially call windows that are part of the system, not the launcher. Try temporarily disabling the third-party launcher and returning to the standard one to check if the problem disappears.

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Themes and launchers are a common cause of visual bugs. If the problem occurs after a change in style, return the standard settings.

It’s also worth checking if zoom in or out of special features are included. These features are for visually impaired users and can distort window scaling. Under Settings → Advanced Settings → Special features make sure that all items related to screen zoom are turned off. This will bring back native scaling.

Additional Solutions and Frequently Asked Questions

If none of the above methods worked, maybe the problem is deeper in the file system or is related to a specific bug in the firmware version, so you can try resetting all your smartphone settings to factory settings, a radical method that requires prior data backup. Before resetting, make sure you save all your important photos and documents.

Sometimes it helps to update the system to the latest available version. Xiaomi developers regularly release patches that fix interface errors. Check for updates in the Settings → About Phone → MIUI version. If the update is already installed, but the problem remains, it is worth waiting for the next major patch or contact the service center if there is a suspicion of a defect in the display (although this is extremely rare).