How To Fix ADB Device Unauthorized Error

How To Fix ADB Device Unauthorized Error

Are you encountering an ADB device unauthorized error?

If yes, then you have come to the right place.

In this guide, you will learn how to fix ADB device unauthorized error.

Android Debug Bridge (ADB) is a programming tool that you can use to connect your PC to an Android device and have full control of it.

People mainly use it for flashing ROMs, debugging, and other advanced tasks.

In Android devices, this function is disabled by default, which means you need to turn it on manually and this is the main cause of the error.

However, we will show you some other causes behind this error also, so keep reading.

Causes: Why Am I Getting ADB Device Unauthorized Error?

  • USB debugging is disabled.
  • Loose USB connection between device and computer.
  • Outdated USB Drivers.
  • ADB daemon not running issue.

These are some common reasons behind the issue.

Let’s check out the solutions to fix it.

How To Solve ADB Device Unauthorized Error

Check if the USB cable is connected to the device and computer perfectly and if USB debugging is enabled on the Android phone. Read further to know more solutions.

Fix 1. Use A Compatible USB Cable

Before trying any other fixes, you should check if the cable you are using is compatible with your Android phone or not.

Also check, if the cable is not loose and connected between both devices perfectly and if the cable is not damaged.

Fix 2. Enable USB Debugging

Another thing that you should check is the USB debugging is enabled in your Android phone. It is one of the major things that you need to use ADB.

Follow the steps to do so.

Step 1: Open Settings and go to About Phone.

Step 2: To enable developer options, you need to tap on the Build number 7 times. (A pop-up message will appear saying “You are now a developer”)

Step 3: Now, search and tap on Developer Options, scroll down, and enable USB Debugging.

Enable USB Debugging

Fix 3. Update USB Drivers

This error appears when ADB is unable to communicate with your Android phone due to a driver issue. This means you need to update your USB drivers to establish a proper connection between your phone and your computer.

These are the steps to follow.

Step 1: On your computer, right-click on the Windows icon and select Device Manager.

Step 2: Click on the Arrow icon present beside “Universal Serial Bus controllers”.

Step 3: Right-click on the problematic USB device and select Update Driver.

Update USB Drivers

Step 4: Click on Search automatically for updated driver software, follow the displayed instructions, and update the drivers.

Once the drivers are updated, check if the problem is solved or not.

Fix 4. Restart ADB Server

If you have tried enabling USB debugging and updating drivers but are unable to solve the issue, then try restarting the ADB servers.

These are the steps to do so.

Step 1: Go to Developer Settings as mentioned in the above method and tap on Revoke USB debugging authorizations > OK.

Revoke USB debugging authorizations

Step 2: Disable Developer Mode, then turn it on and enable USB Debugging.

Step 3: Now, press the Windows + R key on your keyboard and type “cmd”, then press Enter.

Step 4: Now, type “adb kill-server” and press Enter.

Step 5: Type “adb start-server” and press Enter.

Check if this solves the problem or not.

Fix 5. Re-Install ADB Drivers

If the above methods didn’t help you in fixing the error, then you should try re-installing the ADB drivers. First, uninstall the drivers by following the below steps.

Step 1: On your computer, right-click on the Windows icon and select Device Manager.

Step 2: Click on the Arrow icon present beside “Universal Serial Bus controllers”.

Step 3: Right-click on them and select Uninstall driver.

Step 4: Download and install ADB drivers.

You will find the download link on the manufacturer’s website.

Check if the error is solved or not.

Wrap Up

This was the complete guide on how to fix ADB device unauthorized error.

Usually, this error occurs when ADB is unable to communicate with your Android phone due to driver issues. Make sure you update the drivers by following the above methods.

If updating drivers won’t help, then try restarting ADB servers.

I hope you found this guide useful and by following the solutions you might have solved the problem.

Make sure you share this post with others, it can help them also.

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