The call button on Android is one of the most frequently used controls, but its location or functionality is not always satisfactory user. You might want to reassign it to launch a voice assistant, switch the camera, or even turn it off completely to avoid accidental clicks. Depending on the smartphone model and operating system version, the methods for changing the behavior of this button may differ radically.

In this article we will analyze all possible methods - from standard manufacturer settings to using specialized applications and even modifications with root access. You will learn how to adapt the call button to your needs on devices Samsung, Xiaomi, Google Pixel and other popular brands, as well as what restrictions modern versions impose on such changes. Android 14/15 for such changes.

It is important to understand that some methods require technical knowledge or may affect the device warranty. We will dwell on the risks in detail and offer alternative solutions for those who are not ready for radical interventions in the system.

Standard manufacturer settings: what can be changed without additional apps

Many smartphone manufacturers offer built-in options for reassigning hardware buttons. These features are usually hidden in the accessibility menu or advanced interface settings. Let's look at where to look for them on the most popular devices.

On smartphones Samsung (series Galaxy S23, A54 and newer) the path to the button settings looks like this:

  • 📱 Open Settings → Accessibility → Interaction and dexterity → Hardware buttons
  • 🔄 Here you can swap the positions of the buttons Recent applications and Back, as well as customize the behavior of the side keys (including the call button)
  • ⚡ On some models, an option is available Double tap to launch the camera or application of your choice

Device owners Xiaomi (for example, Redmi Note 12 or POCO X5) will find similar options in:

  • ⚙️ Settings → System settings → Buttons and gestures → Power button
  • 🎯 Here you can assign a long press of the call button to launch Google Assistant or Google Assistant data-i="62">Other Mi AI
  • 🔒 On some firmwares MIUI It is possible to completely disable the response to a single click
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Device Google Pixel (starting from Pixel 6) have more limited button customization options. In the standard settings you can only:

  • 🔍 Activate Google Assistant long-press the call button
  • 🚫 Disable reaction to accidental presses in your pocket via Settings → System → Gestures → Preventing accidental touches
⚠️ Attention: On devices with Android 14+ some manufacturers block changes to hardware buttons through standard settings for security reasons. If the desired option is not in the menu, you will have to use third-party applications.

Applications for reassigning buttons without root access

If the built-in options are not enough, third-party utilities come to the rescue. They allow you to flexibly customize the behavior of the call button without requiring superuser rights. Let's consider the most reliable solutions.

One ​​of the most popular applications is Button Mapper (available in Google Play). It supports most modern smartphones and allows you to:

  • 🔄 Reassign single/double presses and holds
  • 📱 Assign the launch of any applications or system functions
  • 🔕 Completely disable button response
  • 🎛️ Configure delays between clicks

To install and configure:

  1. Download Button Mapper from the official store
  2. Give the application permission to Accessibility (in settings Android)
  3. Select the call button from the list of available keys
  4. Assign a new action (for example, launching a flashlight or taking a screenshot)

Check the Android version (the application runs on 7.0+)

Enable USB debugging in developer options

Make sure there are no other applications to control the buttons

Back up important data-->

Another powerful solution - Remapper (previously known as Button Remapper). It stands out:

  • 🔧 Support Tasker-like scenarios
  • 📊 The ability to assign action sequences
  • 🔄 Working with gestures and touch buttons

Both applications have free versions with limited functionality. For full access to the settings, you will need a premium subscription (about 200-300 rubles per year).

⚠️ Attention: Some banking applications (for example, SberBank Online or Tinkoff) may block work on devices with third-party applications for controlling buttons. Before use, check compatibility.

Reassigning buttons using ADB (without root)

For advanced users who are ready to work with the command line, there is a reassignment method buttons via Android Debug Bridge (ADB). This method does not require root access, but requires a computer and basic terminal skills.

Main advantages of the method:

  • 🔧 Deeper customization compared to standard settings
  • 📱 Works on most devices with Android 8.0+
  • 🔒 Does not violate the manufacturer's warranty

Step-by-step guide:

  1. Activate Mode Developer (click on Build number 7 times in the phone settings)
  2. Enable USB debugging in the developer menu
  3. Connect the phone to the computer and install drivers ADB
  4. Open the command line and enter: 
    adb shell

    settings put secure sysui_keycode_call [new_value]

    Where [new_value] is the action code (for example, 26 for the power button)

Popular action codes for reassignment:

Action Code Description
Launch camera 27 Quick launch of the standard camera application
Voice assistant 231 Activation of Google Assistant or proprietary assistant
Last application 187 Switch to the previous open application
Lock screen 26 Emulate pressing the power button
💡

Before experimenting with ADB, create a backup copy of the current button settings using the command adb shell settings list secure | grep sysui. This will help you return everything back if necessary.

Limitations of the method:

  • 🔄 Not all manufacturers support changing hardware buttons via ADB
  • 📱 On some devices, changes are reset after a reboot
  • 🔧 Requires re-installation setup after firmware update

Changing the call button with root access: maximum freedom

For those who are ready to take radical measures, root access opens up almost unlimited possibilities for customizing hardware buttons. This method is suitable for experienced users who understand the risks of voiding warranty and potential security issues.

With root access you can:

  • 🔧 Completely reassign any hardware buttons
  • 📱 Assign complex scenarios (for example, double press + hold)
  • 🔄 Modify system files for permanent changes
  • 🎛️ Adjust sensitivity and response delays

The most popular tools for working with root:

  • 🛠️ Xposed Framework + module Xposed Additions —for flexible configuration without editing system files
  • 📝 Button Remapper (Root) —a specialized application with advanced options
  • 💻 Manual editing files in /system/usr/keylayout/ —for experienced users

An example of editing a keylayout file to reassign the call button to launch cameras:

  1. Open the file /system/usr/keylayout/Generic.kl in a text editor with root access
  2. Find the line key 231 CALL (231 is the standard call button code)
  3. Replace it with key 231 CAMERA
  4. Save the file and reboot the device
What happens if you edit the keylayout incorrectly?

Incorrect changes to the keylayout files can lead to complete inoperability of the hardware buttons. In the worst case scenario, the phone will stop responding to the power button, making a normal reboot impossible. To restore, you will need to flash it through recovery mode or using a computer.

⚠️ Attention: On devices with Samsung Knox or Google Titan M obtaining root access can lead to irreversible activation of hardware security flags. This will block access to some functions (for example, Samsung Pay or Secure Folder).

On devices with Android 12+, even with root access, you may need to disable the security module keymaster to edit keylayout files. This significantly increases the device's vulnerability to attacks.

Alternative solutions: gestures and soft buttons

If changing the hardware call button seems too risky or technically difficult, consider alternative approaches. Modern versions of Android offer flexible settings for gestures and soft buttons that can completely replace physical keys.

The most effective methods:

  • 👆 Navigation gestures: Enable full-screen navigation. in Settings → System → Gestures → System navigation. Now swiping from the bottom up can replace the call button
  • 📱 Floating buttons: Applications like Floating Toucher or Edge Gestures allow you to create virtual buttons anywhere on the screen
  • 🔍 Voice management: Configure the launch of calls through voice commands in Google Assistant or Bixby
  • 🎯 Widgets on the desktop: Create a shortcut for quick access to the phone book or recent calls

For devices with AMOLED screens (for example, Samsung Galaxy S23 Ultra or OnePlus 11) gestures are especially convenient Always On Display:

  • 🔄 Double tap on the switched off screen to launch the camera or calls
  • 📞 Gesture "letter C" for quick access to contacts
  • 🔍 Hold two fingers to activate the voice assistant

Advantages of alternative methods:

  • 🔧 Do not require intervention in system files
  • 📱 Work on any device without restrictions
  • 🔄 Easy to rollback changes if necessary
  • 🎛️ Often offer more options than physical buttons
💡

Gestures and soft buttons are the safest way to customize the interface They do not affect the warranty, do not require root access and work even on the most secure Android devices. 14+.

Problem solving: the call button does not work after changes

If, after trying to reassign, the call button stops responding or behaves incorrectly, do not panic. In most cases, the problem can be solved without completely reflashing the device.

Typical symptoms and their solutions:

Problem Possible cause Solution
The button does not respond at all Incorrect editing of keylayout Restore the original file or reflash the device
The button works, but triggers the wrong action Conflict between several applications for reassignment Disable all such utilities and configure again
The sensitivity of the button has changed Changing delay settings in Button Mapper Reset sensitivity settings in the application
The button only works after a reboot ADB commands are not applied automatically Use a script to automatically apply when start

If the button stops working after editing system files:

  1. Try to boot into Safe Mode (hold the power button → "Restart in Safe Mode")
  2. If the button works in Safe Mode, the problem is in a third-party application
  3. Remove all utilities for reassigning buttons and check operation
  4. If there is a hardware failure, contact a service center

For devices with Samsung Knox or Google Titan M pay special attention to:

  • 🔧 Checking the status Knox via *#06# or Samsung Members
  • 📱 Disabling all modifications before updating the firmware
  • 🔄 Restoring the original firmware via Odin in case of critical failures
⚠️ Attention: On some devices Xiaomi with a locked bootloader, incorrect changes in system files can lead to a “brick” (complete inoperability). In this case, official firmware via Mi Flash Tool with Mi account authorization.

Specifics for different manufacturers and models

Each manufacturer brings its own characteristics to the processing of hardware buttons. Let's consider the nuances for the most popular brands and series of devices.

Samsung Galaxy (One UI 5.0+):

  • 📱 Button Bixby on the left side can be reassigned via Settings → Additional features → Bixby button
  • 🔧 The call button on the right side usually cannot be reassigned without root
  • 🎛️ On Galaxy S22 Ultra and newer, you can assign a double click to launch the camera even in a locked state

Xiaomi/Redmi/POCO (MIUI 14+):

  • 📱 In Settings → Buttons and gestures you can configure the reaction to holding the call button
  • 🔧 On some models (Redmi Note 11), the default call button launches Mi AI when held
  • 🎯 To completely reassign, you will need to unlock the bootloader and install a custom recovery

Google Pixel (Android 13+):

  • 📱 Minimal customization options for hardware buttons
  • 🔧 The call button can only be reassigned to launch Google Assistant when held
  • 🎛️ For advanced changes you will need ADB or root

OnePlus (OxygenOS 13+):

  • 📱 Flexible gesture settings in Settings → System → Gestures and buttons
  • 🔧 Button call can be reassigned to launch the camera through Quick actions
  • 🎯 Support Alert Slider —a unique mode switch that can be customized

For devices with Android Go (for example, Nokia 1.4 or Samsung Galaxy A04):

  • 📱 Customization options are extremely limited
  • 🔧 Most applications for reassigning buttons are not supported
  • 🎯 The only working method is to use gestures or widgets

On devices with foldable displays (for example, Samsung Galaxy Z Fold 5 or Huawei Mate X3):

  • 📱 Call buttons may have different behavior when folded and unfolded state
  • 🔧 Reassignment may require separate settings for each mode
  • 🎯 Some actions (for example, launching multi-window mode) may conflict with the changed buttons

FAQ: Frequently asked questions about changing the call button

Is it possible to return standard behavior of the button after reassignment?

Yes, almost always. If you used the standard settings, just reset them to factory settings. For third-party applications (for example, Button Mapper), just delete the app or reset its settings. When making changes via ADB, run the command:

adb shell settings delete secure sysui_keycode_call

If you edited system files with root access, restore the original files from the backup or reflash the device.

Will reassigning buttons work after updating Android?

It depends on the method:

  • 📱 Standard settings —usually saved after the update
  • 🔧 Application side —may be required re-configuration
  • 🎛️ ADB commands —often reset, need to be reapplied
  • 🛠️ Root changes —may break after major updates

Always check the operation of the buttons after updating the firmware.

Is it possible to reassign the call button to iPhone-like behavior (single press - back)? summary>

Technically this is possible, but it is highly not recommended. Android is optimized for navigation using three buttons (back, home, recent), and reassigning the call button to the "back" function can lead to:

  • 🔄 Conflicts with system gestures
  • 📱 Problems in some applications
  • 🔧 Inconvenience when calls (you will have to use the soft button)

It is better to use standard Android navigation or activate full-screen gestures in the system settings.

Does reassigning buttons affect the operation of NFC or contactless payments?

There is no direct impact, but:

  • 📱 On some devices Samsung changes to system files may trigger Knox and lock Samsung Pay
  • 🔧 Button remapping applications sometimes require permission Special featureswhich may conflict with banking applications
  • 🎯 Contactless payments via Google Pay usually do not suffer from button changes

Before setting up, check the operation of payment systems in test mode.

Is there a way to reassign the call button only for specific applications?

Yes, but this will require a combination of several tools:

  1. Use Tasker to create application launch profiles
  2. Customize Button Mapper or a similar application for responding to taps
  3. Create a task in Tasker that will change the button assignment when opening a specific application

Example: you can make the call button open a list of chats, and in WhatsApp the call button opened a list of chats, and in Google Maps — launched home navigation.