How to deploy incoming full-screen call in Xiaomi Redmi 9C: official and hidden ways

Why incoming calls are displayed in a small window and how to fix it

Owners of Xiaomi Redmi 9C often face a problem: when an incoming call appears on the screen a miniature window with information about the caller, rather than a full-screen notification, as on other smartphones. This is not only inconvenient, it increases the risk of missing an important call, especially if the phone is lying down screen or you are busy with other things, the reasons for this behavior lie in the features of the MIUI shell and default settings.

In earlier firmware versions (before MIUI 12), full-screen calls were enabled by default, but with the release of updates, Xiaomi began to optimize the interface by reducing "intrusive" notifications. For the Redmi 9C, this means that now the user has to manually activate full-screen mode - either through standard settings or using workarounds. Fortunately, there are at least 5 working ways to return the usual display, and we will discuss each of them in detail.

It’s important to understand that the problem is not related to the hardware limitations of the Redmi 9C — even the budget Helio G35 processor and 2 GB of RAM can easily handle rendering a full-screen interface. It’s only about software settings that can be changed without root rights or complex manipulations. Next, you will find step-by-step instructions taking into account different versions of MIUI (from 12 to 14) and possible nuances.

Method 1: Configure with "Special Opportunities" (official method)

Xiaomi’s most reliable and recommended way is to use the built-in “Special Features” feature, which works on all versions of MIUI for Redmi 9C and does not require additional applications to be installed, and the main advantage is that full-screen calls will be shown once activated, regardless of whether the screen is unlocked or not.

Instructions:

1. Open the Settings. → Special facilities.
2. Scroll down and select Call Notifications (some versions of MIUI may call it Full-screen Notifications).
3. Activate the switch next to Full-screen call mode.
4. In the window that appears, confirm the action by clicking Enable.

After that, all incoming calls will be displayed on the entire screen, including information about the caller, acceptance/deflection buttons and additional options (for example, recording a conversation, if it is activated). Note: in MIUI 14, this item can be hidden behind an additional menu - if you do not find it immediately, search by settings (the magnifying icon in the upper right corner).

Incoming call takes up the entire screen |Accept/Discard buttons enlarged |Accept/Discard photo of contact (if any) |The call sound is not interrupted when you turn-->

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If the full screen mode did not work after activation, restart the phone - sometimes changes are applied only after the reboot.

Method 2: Change the notification style in the settings of the "Phone" application

The second official method involves setting up directly in the Phone app, which is suitable if the first option did not work or your version of MIUI does not have a special feature Notification, which allows you not only to turn on full-screen mode, but also to adjust the appearance of the call window (background color, font, animation).

Step-by-step:

1. Open the Phone app (the tube icon on the home screen).
2. Click on the three dots in the upper right corner → Settings.
3. Select Call Notification Style (or Call Style in MIUI 13+).
4. In the Display Mode section, select Full Screen.
5. Save the changes and restart the application.

In the same menu you can configure additional parameters:

• 🎨 Color theme: Choose a dark/light background for the call window.
• 🔄 Animation: enable smooth notification appearance (may slightly delay display on weak devices).
• 📞 Control buttons: change the location of the Accept/Deflect buttons (e.g. swipe up/down instead of taps).

Method 3: Using hidden MIUI settings (for advanced users)

If standard methods don't work, you can use hidden MIUI settings, which are available through engineering menus or special codes. This method requires caution, as improper actions can cause malfunctions in the phone. On the Redmi 9C with MIUI 12.5 and later, this method works in 85% of cases, but can reset after a firmware update.

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. In the menu that appears, select Phone Information (or Phone Information).
3. Scroll down to the Call Settings block and find the Full Screen Incoming Call option.
4. Set the Enabled value and save the changes.
5. Restart your phone to apply the settings.

Alternatively, use the Miui Hidden Settings app (available on Google Play).

• Open the application and give access to the settings.
• Go to the Call Settings section → Incoming Call.
• Activate the Force Full Screen option.

Method 4: Third-Party Applications for Full-screen Calls

If the built-in methods didn’t work, you can install a third-party app that will take over the processing of incoming calls and show them in full screen mode. 9C:

Before installing a third-party application:

⚠️ Warning: Revoke permissions to access contacts and calls from apps you no longer use. on Redmi 9C With 2 GB of RAM, the background operation of such programs can slow down the system.

How to set up Full Screen Caller:

1. Install the application and open it.
2. Provide access to Contacts, Phone and Notifications.
3. Select Display Style → Full Screen.
4. Activate the Override Default Call Screen option.
5. In the Themes section, select the notification design (e.g. MIUI Style for natural appearance).

Method 5: Reset the settings of the Phone application (if nothing helps)

In rare cases, full-screen call settings can get lost due to update conflicts or cache errors. If previous methods have failed, try resetting the Phone app to factory settings. This won't delete your contacts or call history, but will return all display settings to default values.

Instructions:

1. Go to Settings → Applications → Application Management.
2. Find the phone in the list and click on it.
3. Select Warehouse → Clear the cache and Reset the settings.
4. Confirm the action and restart the phone.

After discharge:

• 🔄 Re-check the full-screen call settings (Method 1 or 2).
• 📱 Update the Phone app via Google Play if a new version is available.
• 🔍 Make sure that in the settings → Notifications → Applications for Phone included all permissions.

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Resetting the phone app is an extreme method that is worth trying only if other methods have failed, and 90% of the time, the problem is solved through “Special Features” or notification style settings.

Frequent mistakes and their solutions

Even after setting up the full-screen calls correctly, let’s look at the typical issues and ways to fix them on the Xiaomi Redmi 9C:

If after all the manipulations full-screen calls and did not work, the reason may be:

• 🛠️ Castom firmware: Informal assemblies MIUI Often remove some functions for optimization.
• 🔒 Policy of the region: Firmware for China or India may have restrictions on changing the call interface.
• 📱 Hardware failure: Rarely, but possible proximity sensor problems that interfere with correct display.

⚠️ Attention: On Redmi 9C firmware MIUI 12.0.1-12.0.3 There is a bug that only displays full-screen calls after the first missed call. Solution: Update your firmware to the version. 12.0.4 or newer.

FAQ: Answers to popular questions