How to Fix ADB Device Unauthorized Error

The Android Debug Bridge (ADB) was a powerful tool that allows users to control their Android devices from a computer. It is used for debugging, flashing ROMs, and other advanced functions. Unfortunately, it can sometimes be unreliable, and one of the most common errors is the “ADB Device Unauthorized” error that appears when attempting to connect your device to ADB.

ADB device unauthorized error is an irritating issue that can occur when attempting to use the Android Debug Bridge (ADB) to connect your device to a computer or laptop. This error prevents users from using ADB to access their devices and can be difficult to troubleshoot.

This article will discuss the causes of this error and how to fix it. We will go through a few different methods that can be used to get ADB up and running again and ensure your device is correctly connected to your 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 on the device.

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 a relatively simple process. The ADB Device Unauthorized Error is an issue that occurs when a user attempts to connect an Android device to a laptop via a USB connection. The error message indicates that the device is not authorized to communicate with the computer.

In order 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 will not be able to establish a secure connection with the device. Additionally, the USB cable must be in good working condition, as a faulty cable can also cause an error.

Check USB Debugging

The first thing you should do when trying to fix an unauthorized ADB error is to check if USB Debugging was enabled on your Android device. To do this, go to the Settings menu, scroll down to the Developer Options option, and make sure that 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 to ensure that 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. You can do this by searching for “Device Manager” in the Start menu.
  2. Locate the USB device that is giving you 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 should be able to 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 trying to connect 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, then locate the Universal Serial Bus controllers and right-click on it. Now Select Uninstall Driver to proceed.

Step 2: Download and Install the ADB Driver

Next, you will need to download and install the ADB driver for your device. You can usually find the download link on the manufacturer’s website. Once you have the driver downloaded, simply double-click on it to begin the installation process.


The ADB Device Unauthorized Error is a common issue that many Androids users experience. Thankfully, there are some easy steps that you can take to fix this error by checking your USB cable and USB port or try 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 all else 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?.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.