If you have ever looked through the list of installed applications on your Android smartphone, you might have come across a mysterious name — ANT DUT. It doesn't have an icon, doesn't appear in the menu, and often makes users suspicious. What is this app? Why do you need it? Is it possible to remove it without consequences for the system?

In this article we will analyze ANT DUT in detail: from its technical purpose to practical tips for managing it. You will find out whether it is associated with viruses, why it appears on some devices, and how to deal with it correctly - leave it, disable it, or delete it. We will also look at the nuances for different smartphone manufacturers (Samsung, Xiaomi, Huawei etc.), since their approach to system utilities may differ.

What is ANT DUT and why do you need it

ANT DUT (or com.android.antdut) - this is a system application that is responsible for diagnostics of USB connections at the firmware level. It is part of the proprietary shells of some manufacturers (mainly Samsung and LG) and is used:

  • 🔌 To test the compatibility of the device with USB peripheral devices (keyboards, mice, flash drives).
  • 📊 To collect data on the performance of the USB port when connected to a PC (for example, when flashing firmware via Odin or Smart Switch).
  • 🛠️ In service centers - to diagnose hardware faults (for example, damaged connector contacts).

Important understand that ANT DUT is not a user applicationa system component. It has no interface, does not consume resources in the background and does not send data to the Internet. Its main task is to ensure the correct operation of the Android USB stack during low-level operations.

On devices of other brands. (for example, Xiaomi or Realme) similar functions can be performed by other utilities, for example com.qualcomm.qti.usbsettings or com.android.usbdiagnosticsHowever, ANT DUT most often found on smartphones Samsung with firmware database One UI.

📊 Did you find ANT DUT in the list of applications?
Yes, on Samsung
Yes, on another brand
No, I haven’t seen it
I don’t know what it is

ANT DUT and security: a virus or a system component?

Many users mistake ANT DUT for malware because of its “suspicious” name and the absence of an icon. However, this not a virusis a legitimate part of the firmware. Here's how to distinguish the real one. potential threat: ANT DUT from a potential threat:

  • 📌 Installation path: the original application is located in /system/priv-app/ and has a manufacturer's signature (verified through APK Analyzer or VirusTotal).
  • 🔍 Behavior: the virus version may request superuser rights, create network traffic or appear in the list of running processes (check in Settings → Applications → Running).
  • 📅 Installation date: system ANT DUT is installed along with the firmware, and does not appear later (look at the date in Settings → Applications → ANT DUT → Information).

If you If in doubt, check through an antivirus (for example Malwarebytes or Dr.WebPlease note: some antiviruses may mark system utilities as “potentially dangerous” due to their low-level access - this is a false positive.

⚠️ Attention: If ANT DUT suddenly starts consuming traffic, asking for permissions or appearing in notifications - this is a sign that the original file has been replaced. In this case, it is recommended to reset the smartphone to factory settings or reflash it.
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To ensure its security ANT DUT, compare its hash with the reference one. To do this, download. original firmware for your model from the manufacturer's website and extract the file antdut.apk from the archive.

Is it possible to remove ANT DUT and what will this lead to?

Technically ANT DUT can be removed, but this is not always safe. smartphone model and firmware version:

Action Consequences for Samsung Consequences for other brands
Removal via ADB Functions may be lost Smart Switch and USB diagnostics in the service menu (#0#) Errors are likely when connecting to a PC (for example, “Device not recognized”)
Disconnection No consequences, but diagnostic utilities (for example, Samsung Members) may issue warnings No critical consequences
Replacement with a custom version High risk of loss of warranty and unstable USB operation There may be conflicts with other system services

If you still want to get rid of ANT DUT, the safest way is disable it, rather than deleting it. To do this:

  1. Go to Settings → Applications.
  2. Find ANT DUT in the list (you may have to enable display of system applications).
  3. Click Disable (not "Delete"!).
⚠️ Attention: On some devices Samsung s One UI 5.0+ disable ANT DUT may lead to malfunctions DeX (desktop mode). Before disabling, check whether you are using this feature.

How to remove ANT DUT completely (for advanced users)

If you decide to remove ANT DUT completely, you will need rights root or access k ADB. Below is the algorithm for both methods, but remember: wrong actions can lead to the device being bricked (completely inoperable).

Method 1: Removal via ADB (without root)

This method is suitable for most devices running Android 8.0 and higher. You will need:

  • 🖥️ Computer with installed ADB Tools.
  • 📱 Enabled USB debugging on your smartphone (Settings → About phone → Build number — press 7 times, then return to Settings → System → For developers → USB debugging).

Steps:

  1. Connect your smartphone to the PC and open the command line (or Terminal on Mac/Linux).
  2. Enter the command: 
    adb shell pm uninstall --user 0 com.android.antdut
  3. Restart the device.

If the command does not work, try the alternative: 

adb shell pm disable-user --user 0 com.android.antdut

(this will disable the application for the current user).

Method 2: Uninstall via root (for advanced)

If you have root access, use a file manager with superuser rights (for example, Root Explorer):

  1. Go to the folder /system/priv-app/ANT_DUT/.
  2. Delete files ANT_DUT.apk and ANT_DUT.odex (if any).
  3. Clear the cache in /data/dalvik-cache/ (find files with title com.android.antdut*).
  4. Reboot the device.

Make a backup copy of your data|Check the model and firmware version|Make sure USB debugging is enabled|Have the original firmware on hand in case of failure-->

ANT DUT and custom firmware: what you need know

If you use custom firmware (for example, LineageOS, Pixel Experience or CrDroid), ANT DUT may:

  • 🔄 Be replaced with an analogue (for example, com.android.usbdiagnostics v AOSP).
  • ⚠️ Cause conflicts with modules. on Magisk (for example, when using USB Fix).
  • 🛠️ Requires manual configuration of access rights (SELinux) if you deleted it.

On firmware based on AOSP (for example, GrapheneOS), ANT DUT usually absent initially, since its functions are integrated into the kernel. If you encounter USB errors after installing custom firmware, try:

  1. Flash the kernel with support USB OTG.
  2. Install a module Magisk to fix USB (USB Fix for Samsung or similar).
  3. Return the standard kernel via TWRP.
⚠️ Attention: On some custom firmware for Samsung (for example, Havoc-OS) deletion ANT DUT may result in the inability to charge via USB-C This is due to implementation features PD (Power Delivery) in the stock core.

ANT DUT on different devices: Samsung, Xiaomi, Huawei and others

Manufacturers implement USB diagnostics differently. Here's how things stand with ANT DUT on popular brands:

Brand Availability of ANT DUT Alternative software Can I delete
Samsung Available on most models (A, S, Note series) com.sec.android.app.usbsettings Not recommended (risk of problems with DeX i Smart Switch)
LG Available on flagships (G, V, Velvet series) com.lge.usbdiagnostics Can be disabled, but not deleted (errors are possible LG Bridge)
Xiaomi/Redmi/Poco Absent (used com.qualcomm.qti.usbsettings) — Not applicable
Huawei/Honor Absent (diagnosis via HiSuite) com.huawei.usb Not applicable
Google Pixel Absent (used stock AOSP mechanism) — Not applicable

On devices Samsung ANT DUT is tightly integrated with service menus, such as #0808# (USB settings) or #9900# (SysDump). stop working or give errors. On LG the situation is similar - ANT DUT connected with LG Mobile Support Tool.

On smartphones Xiaomi and other brands with firmware database MIUI or ColorOS instead of ANT DUT other mechanisms are used. For example, in MIUI a service is responsible for USB diagnostics, which cannot be deleted without consequences for com.miui.usb, which cannot be removed without consequences for Mi PC Suite.

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On devices Samsung i LG ANT DUT it is part of the service software and is removed only in extreme cases. On other brands it is not - alternative solutions are used instead.

Frequent problems with ANT DUT and their solutions

Although ANT DUT usually works quietly, it can sometimes cause problems. Here are the most common problems and how to fix them:

  • 🔋 "ANT DUT is consuming battery": This is unlikely, since the application does not have any background processes. If you see battery consumption, check your smartphone for viruses - the original utility may have been replaced.
    How to check the authenticity of ANT DUT?

    Download an APK analyzer (for example, APKTool) and compare file signature ANT_DUT.apk with other system applications. If the signatures do not match, it is a fake.

  • 📵 "USB does not work after removing ANT DUT": Restore the file from a backup copy or reflash the smartphone. On Samsung a reset via ##7262626## (service menu) may help.
  • ⚙️ "ANT DUT displays an error when connecting to a PC": Update the drivers Samsung USB Driver on your computer or try a different cable (preferably original).
  • 🔄 "ANT DUT constantly restarts": This may be due to damage to the system partition. Perform a reset via Recovery (Wipe Cache Partition).

If after manipulating with ANT DUT the smartphone stops charging via USB, check:

  1. Integrity of the connector (possibly mechanical damage).
  2. Settings fastboot (enter in the terminal: 
    adb shell getprop | grep usb

    and check the parameter sys.usb.config).

  3. USB controller status (via the engineering menu, if available).
❓ Can ANT DUT track me?

No, ANT DUT does not have access to the Internet, camera, microphone or personal data. This is a local USB diagnostic utility that only works when connected to a PC or peripherals. However, if you installed a modified version from an untrusted source, it could theoretically contain malicious code. Always check the integrity of system files.

❓ Why did ANT DUT appear after the update?

This is normal - manufacturers often add or update system utilities in new firmware versions. For example, in One UI 4.0 Samsung extended functionality ANT DUT to support USB 3.2. If the update was "dirty" (without a reset), old versions of system applications may conflict with new ones. In this case, resetting to factory settings will help.

❓ How to restore ANT DUT after deletion?

There are three ways:

  1. Via ADB: If you deleted with the command pm uninstall, try restoring from a backup: 
    adb shell cmd package install-existing com.android.antdut
  2. Via firmware: Download the stock firmware for your model (for example, from SamMobile for Samsung) and flash it via Odin or Fastboot.
  3. Via TWRP: If you have a backup copy of the partition /system, restore it through custom recovery.

On Samsung you can also try using the service menu: enter ##197328640##, select USB Settings and reset settings.

❓ Does ANT DUT affect performance?

No, ANT DUT does not consume CPU, RAM or battery resources in normal mode. It is activated only when you connect a USB device or run diagnostic utilities (for example Samsung Members). If you see high resource consumption, the reason could be:

  • A virus masquerading as ANT DUT.
  • Conflict with another system application (for example, com.sec.android.app.launcher).
  • File system damage (check through fsck in TWRP).
❓ Is it possible to transfer ANT DUT to another smartphone?

Technically it is possible, but meaningless. ANT DUT is strictly tied to the hardware platform and firmware version. For example, the version for Samsung Galaxy S21 will not work on Galaxy A52even if they are on the same chipset. In addition, manual installation of system APKs without the manufacturer's signature will lead to errors SELinux . device brick.