How to Fix ADB Device Unauthorized Error

The Android Debug Bridge (ADB) is a powerful tool for managing Android devices from a computer. It is commonly utilized for debugging, flashing ROMs, and other advanced operations. However, it is prone to occasional unreliability, with one of the most prevalent issues being the “ADB Device Unauthorized” error encountered when attempting to establish a connection between the device and ADB.

The ADB device unauthorized error presents a vexing obstacle during attempts to link a device to a computer or laptop using the Android Debug Bridge (ADB). This impediment hinders users from utilizing ADB to access their devices and can pose challenges in terms of resolution.

This article will delve into the root causes of this error and provide solutions. It will explore multiple methods that can be employed to restore the functionality of ADB and ensure the correct connection of the device to the computer or laptop.

How to Fix ADB Device Unauthorized Error

What Causes ADB Device Unauthorized Error

A variety of issues can cause unauthorized ADB device errors. This error usually occurs when the device is not properly connected to the computer via USB or when the USB debugging mode is not enabled. It can also occur if the USB driver is not installed on the computer or if the ADB daemon is not running.

Fix ADB Device Unauthorized Error

Android Debug Bridge (ADB) is a versatile command line tool that lets you communicate with and control an Android-powered device over a USB link from a computer. However, sometimes users may experience an “unauthorized” error message when they attempt to use ADB. Fortunately, this error can usually be resolved with a few simple steps. Here are the methods you need to take to fix the ADB Device Unauthorized error:

Check Your USB Cable

Using a USB cable to fix an ADB Device Unauthorized Error is relatively simple. The Error occurs when a user attempts to connect an Android device to a laptop via a USB connection. The error message indicates that the device cannot communicate with the computer.

To fix this issue, the user must ensure that the USB cable being used is compatible with the Android device. If the cable is not compatible, it cannot establish a secure connection with the device. The USB cable must also be in good working condition, as a faulty cable can also cause an error.

Check USB Debugging

When trying to fix an unauthorized ADB error, the first thing you should do is check if USB Debugging is enabled on your Android device. To do this, go to the Settings menu, scroll down to the Developer Options option, and ensure USB Debugging is enabled.

Restart the ADB Server

If you’ve checked that USB Debugging is enabled and you’re still getting the ADB unauthorized error, you should try restarting the ADB server. To do this, open the command prompt on your computer, type in “adb kill-server” and hit enter. Then, type in “adb start-server” and hit enter again.

Update Your USB Drivers

If you are trying to debug your Android device using ADB and have encountered the error “ADB Device Unauthorized,” you may need to update your USB driver. This error occurs when ADB can’t communicate with your device due to a driver issue. Updating the driver can help ensure your computer properly recognizes your device. This guide will show you how to update your USB driver.

  1. Open the Device Manager on your laptop by searching for “Device Manager” in the Start menu.
  2. Locate the USB device causing the error. It is usually listed under the “Universal Serial Bus controllers” section.
  3. Right-click on the device and select “Update Driver” from the menu.
  4. Select “Search automatically for updated driver software” and follow the on-screen instructions.
  5. Once the driver has been updated, you can use ADB without any issues.

Updating your USB driver can be an effective way to resolve ADB Device Unauthorized errors. While the process is relatively simple, it is always best to consult.

Uninstall and Reinstall the ADB Drivers

ADB (Android Debug Bridge) is a command-line tool that allows you to access and control an Android device from a computer. However, sometimes you may encounter the “ADB device unauthorized” error when connecting a device to your computer via ADB. This error means that your computer does not recognize the device. Fortunately, this issue can usually be resolved by uninstalling and reinstalling the ADB driver. Here’s how:

Step 1: Uninstall the ADB Driver

First, you will need to uninstall the ADB driver from your computer. To do this, open the Device Manager, locate the Universal Serial Bus controllers, and right-click on them. Then select Uninstall Driver to proceed.

Step 2: Download and Install the ADB Driver

Next, you must download and install your device’s ADB driver. The download link is usually found on the manufacturer’s website. Once you download the driver, simply double-click on it to begin the installation process.


The ADB Device Unauthorized Error is a common issue many Android users experience. Thankfully, there are some easy steps that you can take to fix this error, such as checking your USB cable and USB port or trying toggling the USB Debugging option in your phone’s Developer Options. If that doesn’t work, try restarting your phone and your laptop. Finally, if everything fails, you may have to reset your phone or reinstall the ADB drivers. With the steps outlined here, you should be able to quickly and easily fix the ADB Device Unauthorized Error.


  1. I want to update software for my Samsung galaxy note II to the latest software and fix unauthorized issues so that My mobile device runs on the new version

  2. so my galaxy device if frozen on an error while updating firmware. i incorrectly Used Odin. And I can’t get it to. Correct itself. Any suggestions?.

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