Xiaomi’s Full Screen Call: How to Make and Set Up

Owners of smartphones Xiaomi, Redmi and POCO Often, you'll find that the incoming call doesn't appear on the entire display, but rather as a small floating window, which can be very inconvenient, especially if you have a large screen or are used to a classic interface. The problem is relevant for devices operating under the control of shells MIUI HyperOS.

In this article, we will discuss in detail how to return full-screen call mode, why the system switches to window format and what hidden settings affect the display of the call interface.

There are several reasons why Xiaomi may limit the display area of a call, which may be due to activated multi-tasking features, special features settings, or features of the system application Phone.

Causes of the floating call window

MIUI

HyperOS

Another reason could be a conflict of versions of system applications: if the Phone or Contacts app was updated through the Google Play Store and the system settings remained old, the interface may not display correctly, and screen rights on top of other applications may also affect.

⚠️ Note: Do not remove system updates to the Phone application unless absolutely necessary, as this can lead to unstable operation of the communication module and loss of call history.

Sometimes the problem is with activated Do Not Disturb mode or specific settings for specific contacts, in which case the system forcibly changes the style of the call notification to visually highlight it or, conversely, make it less noticeable.

Configure through the menu "Special features"

You need to open Settings, then find Advanced Settings (or Additional) and select Special Features, and you should carefully look at the list of active features. We are interested in the sections related to interface management.

• 🔍 Find the “One-Hand Manipulation” item and make sure it’s turned off.
• 🔍 Check the “Grow” section – screen zooming can narrow the scope of a call.
• 🔍 Turn off Quick Commands if they activate floating windows on incoming calls.

After disabling the unnecessary functions, it is recommended to restart the device, which will allow the Android system to recalculate the display parameters and apply changes to all system dialogs, including the incoming call window.

Settings of the Phone and Google app

Xiaomi

Open the Phone app, click on the three dots in the top right corner, and select Settings. Next, go to Incoming Calls. There may be an option that tells you how you display or how you respond. Some shell versions hide the floating window switch here.

If you use the native MIUI Dialer app, check the notification settings. Sometimes the system classifies an incoming call as a normal notification if the spam filter or number detector is triggered, in which case the call is displayed in a curtain or a small window.

Also check permissions. Go to Settings → Apps → All apps → Phone → Other permissions. Make sure you allow display on top of other apps. Without that right, the system can block the full-screen UI from unfolding.

Solving the problem through the engineering menu

Type in the dial menu the code ##6484## to enter test mode or ##4636### for the phone information menu. In the second case, select Phone Information. You can see network status and additional settings here, but direct switching of screen mode is rare here.

It is important to understand that the engineering menu is primarily designed to diagnose GSM/LTE networks. Direct settings for the “call window size” are not there, but resetting network settings can help if the problem is caused by a software modem failure.

⚠️ Warning: Do not change the values in the engineering menu unless you are sure of their purpose. Incorrect frequency settings can lead to complete lack of communication.

Resetting settings and cleaning the cache

Go to Settings → Apps → All apps. Find your Phone (or Google Phone) in the list. Click on Memory or Storage. There are two buttons available: Clear cache and Clear everything (or Delete data).

First, try to clear the cache. This is safe and won't delete your call history. If the problem persists, use the "Clear Everything" function. After that, the phone will behave as new in terms of call settings, and the window should become full-screen by default.

Don’t forget to also clear your Contacts and Themes app data, as they are closely related to the visualization of the call interface, especially if you’ve been installing third-party themes.

The impact of third-party themes and launchers

Android

To check this out, open the Themes app, go to the profile (human icon) and select My Themes. Click on a standard Classic or Default theme and apply it. If the call is back on the screen, then the previous theme has been corrupted or incorrect.

💡

Use only official themes from the top-rated MIUI store to avoid interface conflicts.

A similar situation is observed when using third-party launchers (Nova Launcher, Microsoft Launcher, etc.) They can intercept control of windows. Try temporarily to return to the standard POCO Launcher launcher or MIUI system launcher for verification.

Frequently Asked Questions (FAQ)

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In 90% of cases, the problem is solved by switching the theme to a standard one or cleaning the cache of the Phone application.