Smartphone owners Samsung often encounter unclear process names when analyzing battery consumption or viewing the list of installed applications. One of the most common questions is com.samsung.android.incallui. Users see this identifier in settings, task manager, or error logs and begin to worry about the security of their device. In fact, this is not a virus or spyware, but a critical component of the operating system.
This process is responsible for the graphical interface of the screen during a telephone conversation. Without it, you wouldn't be able to see the end call button, turn on speakerphone, or put a call on hold. Understanding how it works InCallUIwill help you correctly diagnose problems with sound or screen freezing during incoming calls.
In this article we will analyze in detail the purpose of this package, the causes of possible failures and how to fix them. You will learn why the system does not allow you to simply remove this component and what alternative actions you can take if the call interface does not work correctly. We will also touch on optimization and interaction with other system services.
Technical purpose and process architecture
Identifier com.samsung.android.incallui indicates that this application is part of a proprietary add-on One UI from the company Samsung, working on top of the kernel Android. The main task of this component is to render the user interface (UI) during an active voice or video call. When you dial a number or receive an incoming call, it is this process that is activated on top of all other windows.
It is important to distinguish between the dialing process itself (Dialer) and the call interface (InCallUI). Dialer is responsible for the connection logic, dialing numbers and call history, while InCallUI is exclusively concerned with the visual part of the active conversation. This separation allows developers to update the call screen design independently of the telephony logic, which is especially important for major shell updates.
The process is tightly integrated with system services Telecom i Phone. It requests permission to use the proximity sensor to dim the screen during a call, and controls how audio is routed through the speaker, headphones, or headset. If you notice that the screen does not go dark when you bring the phone to your ear, the problem may lie precisely in a conflict between this application and the sensor drivers. Bluetooth. If you notice that the screen does not turn off when you hold the phone to your ear, the problem may lie precisely in a conflict between this application and the sensor drivers.
⚠️ Attention: The process com.samsung.android.incallui has high privileges in the system. Trying to force stop it via ADB without understanding the consequences may result in you being unable to end calls until the device is rebooted.
The application's architecture is optimized for minimal resource consumption in the background. It is only activated by a call event, which explains why you normally don't see it actively consuming the CPU. However, if it crashes, it may become stuck in the active state, causing increased battery drain.
If the call screen appears with a delay, try clearing the application cache in the settings without deleting user data. This often solves the problem of slow interface rendering.
Why an application cannot be deleted and what the consequences are
Many users try to free up memory space by deleting all incomprehensible system applications. In the case of com.samsung.android.incallui this approach is categorically wrong. This is not just an “extra” application, but a system component registered in the /system/priv-appsection. It is impossible to remove it using normal means through the smartphone settings.
Even if you have Rootrights or use ADB (Android Debug Bridge) for forced uninstallation, the consequences will be serious. Once this package is removed, the phone will no longer be able to display the active call interface. You will be able to initiate a call, hear beeps, but the screen will remain black or show the desktop, and the call control buttons will be unavailable.
- 📞 Complete loss of the ability to end calls programmatically (you will have to wait for a reset or remove the battery).
- 🚫 Inability to switch between speakers, microphone and headset during conversation.
- 📵 Lack of visual indication of an incoming call (the screen may not light up).
- 🔄 Failures in video calls through the built-in phone book.
Restoring functionality after such deletion will require resetting the device to factory settings or flashing the stock firmware via Odin. This is a time-consuming process that will result in the loss of all personal data if you do not have an up-to-date backup. Therefore, the only correct solution is to leave the application in the system.
Removing com.samsung.android.incallui makes the smartphone unsuitable for making voice calls in the usual sense, turning it into a device without a telephone function.
Diagnostics of errors and interface failures
Despite the stability, users sometimes encounter errors associated with this process. The most common problem is the message "Sorry, the com.samsung.android.incallui application has stopped." This can happen during an incoming call, immediately after dialing a number, or when trying to open call history.
The reasons for such failures most often lie in a software version conflict. For example, after updating Android to a new version, components InCallUI may interact incorrectly with outdated cache data. The problem may also be caused by third-party applications that intercept calls, such as caller ID or spam blockers.
To diagnose the problem, it is recommended to check the event log. If the error repeats systematically, pay attention to the following symptoms:
- 📉 Rapid battery drain even in standby mode (the process does not “fall asleep”).
- 🔇 Sound distortion or lack of sound when the call interface is active.
- 🖥️ Black screen during a call when running dynamics.
- ⚡ Spontaneous reboot of the phone when there is an incoming call.
⚠️ Attention: If the error occurs immediately after installing a new launcher or theme, the problem may be incompatibility of graphic elements with the system call interface.
Sometimes the failure is temporary and associated with full RAM. In such cases, simply restarting the device may temporarily fix the problem, but a complete solution will require clearing the application data.
Step-by-step guide for troubleshooting
If you encounter unstable operation of the call screen, do not rush to contact the service center. In most cases, the problem can be solved using software methods. The first step should always be to clear the cache and data of the problematic component. This is safe and will not delete your contacts or call history.
To perform this operation, go to the settings menu of your smartphone. Find the section Applications and find Built-in application for calls or InCallUIin the list. If searching by name com.samsung.android.incallui does not produce results in normal mode, turn on the display of system processes in the menu (three dots in the corner of the screen).
Settings → Applications → (Filter: System) → Built-in application for calls → StorageIn the storage menu that opens, press the button "Clear cache". If this does not help, use the "Clear data"button. The system will warn you that the application settings will be reset. Confirm the action. After that, reboot the device and check the operation of telephony.
☑️ Checklist for eliminating InCallUI errors
If clearing your data doesn't help, try uninstalling updates for this application. In the same storage menu, click on the three dots in the upper corner and select "Uninstall updates". This will return the application to the factory version that was installed when you purchased the phone. This often resolves conflicts that arose after an unsuccessful firmware update.
Interaction with other system services
The ecosystem Samsung is built on the complex interaction of many daemons and services. com.samsung.android.incallui does not work in a vacuum. It constantly exchanges data with the service com.android.server.telecom, which is part of the pure Androidservice, and the service com.samsung.android.app.telephonyui.
Particular attention should be paid to interaction with accessibility functions. If you have disabled services enabled (such as TalkBack or real-time captions), the call interface may behave differently. It should adapt to these settings, but sometimes access rights conflicts arise.
| System component | Interaction function | Possible conflict |
|---|---|---|
| Telecom Framework | Call status management | Desynchronization of status (the call is in progress, but the UI shows hang up) |
| Proximity Sensor | Screen lock | The screen does not go dark or does not turn on after conversation |
| Audio Flinger | Sound routing | No sound in the speaker when the UI is active |
| Notification Manager | Display of notifications | Duplicating notifications about missed ones |
It is also worth mentioning the influence of third-party applications. Caller IDs like Truecaller or Yandex.Identifier are implemented into the call processing process. They request data from InCallUIto show the name of the caller. If such an application freezes, it can “hang” the system call interface.
How to check the influence of third-party applications?
Load the phone into safe mode (hold the power button, then press and hold the "Turn off" icon on the screen until you are prompted to boot into safe mode mode). If calls work reliably in this mode, it means that the problem is caused by one of the applications you have installed.
Optimization and energy consumption
The issue of energy efficiency is acute for modern smartphones. Users often notice that com.samsung.android.incallui consuming a significant percentage of battery power in statistics. It's important to understand the context: if you talk a lot, that's normal. The screen is one of the most energy-consuming components, and this application keeps the screen active.
However, if you have not made calls, and the process is still listed among the leaders in energy consumption, this is a sign of “wakelock” - a situation where the application does not allow the processor to go into deep sleep mode. This may occur due to an error in the code or a frozen background process.
To optimize performance, it is recommended:
- 🔋 Disable unnecessary animations in the developer settings.
- 📡 Check the operation of the communication module (possibly a poor signal forces the application to update the status more often).
- 🚫 Limit background activity for unwanted caller IDs.
⚠️ Attention: Settings menu details and item names may vary depending on the version of One UI (4.0, 5.0, 6.0) and your device model. Always check the current interface of your smartphone. Using a dark theme (Dark Mode) can also reduce the load on the screen during calls, especially on devices with matrices, where black means the pixels are turned off. Since
Using a dark theme (Dark Mode) can also reduce screen strain during calls, especially on devices with AMOLED-matrices, where black color means turned off pixels. Because InCallUI supports the system theme, this is an easy way to extend battery life.
InCallUI's high power consumption is only justified during long calls. In standby mode, it should consume less than 1% of the charge per day.
Frequently asked questions (FAQ)
Is it possible to replace the standard calling interface with another?
Technically this is possible, but extremely difficult for the average user. You'll need to install a third-party launcher that supports phone app replacement and set it as your default app in Settings. However, on smartphones Samsung the system often blocks a complete replacement of the system one InCallUI, returning the standard interface for important calls (emergency services, alarm clock).
Why did the call interface become different after updating Android?
Company Samsung regularly updates the design InCallUI along with major shell updates One UI. Changes may include button layout, color scheme, and animations. This is a normal situation aimed at improving the user experience. You can return the old design only by rolling back the firmware to the previous version, which is not recommended due to security risks.
Does this process affect the quality of voice communication?
No, com.samsung.android.incallui responsible only for the image. Sound quality depends on the modem, antennas, codecs and service operation Telecom. However, if the interface freezes, you may not see the button to switch to speakerphone, which will indirectly affect the usability of the connection, but not the technical quality of the signal.
Is it safe to give this application all permissions?
Yes, this is a system application from the device manufacturer. It requires access to your phone, contacts, microphone, camera (for video calls) and an overlay on top of other windows. Revoking these permissions will result in the calling feature not working. Trust in this component is a basic condition for the smartphone to function as a phone.
What to do if the “Reset” button is not pressed on the screen?
This is a critical interface failure. Try quickly pressing the screen lock (power) button several times - on some models this will force the call to end. If it doesn’t help, the only way out is to wait until the other person hangs up the call, or remove the battery (if the design allows) to force a reboot of the device.