Troubleshooting ADB Connection Issues with Nexus 4: Unauthorized Device

Troubleshooting ADB Connection Issues with Nexus 4: Unauthorized Device

22 April 2024 Stephan Petzl Leave a comment Tech-Help

Understanding the ‘Unauthorized’ Status

When attempting to connect your Nexus 4 (or any Android device) to your computer via ADB (Android Debug Bridge), you may encounter an ‘unauthorized’ status. This typically indicates that your computer has not been granted permission to communicate with the device for debugging purposes.

Steps to Resolve ADB Connection Issues

Here are some practical steps you can take to resolve the ‘unauthorized’ status and establish a successful ADB connection:

  1. Toggle USB Debugging: Navigate to Settings > Developer Options on your device and toggle the USB Debugging option off and on. If this does not prompt an authorization message, try reconnecting the USB cable.
  2. Restart ADB Server: On your computer, use the terminal (or command prompt) to execute adb kill-server followed by adb start-server. This will restart the ADB daemon.
  3. Change USB Connection Mode: Switch the USB connection mode from MTP to PTP or another available mode by navigating to Settings > Storage on your device, then reconnecting to your computer.
  4. Check Driver and Environment Setup: Ensure that you have the appropriate drivers installed on your computer and that your environment variables are correctly set. For Windows users, the Universal ADB Driver may be beneficial.
  5. Revoke USB Debugging Authorizations: On your device, go to Settings > Developer Options and tap ‘Revoke USB debugging authorizations’, then reconnect your device.

If these steps do not result in the authorization prompt, you may need to consult additional troubleshooting guides specific to your operating system.

Repeato: Streamlining Your ADB Testing Process

While troubleshooting ADB connections is essential, maintaining a robust testing process is equally critical. Our product, Repeato, offers a no-code test automation tool for iOS and Android that can accelerate and simplify your testing workflow.

Repeato’s computer vision and AI-powered system allow it to work seamlessly with various app frameworks, including React Native, Flutter, and Unity. Furthermore, with ADB on board, Repeato can execute ADB commands via script steps, enhancing your ability to automate and manage tests efficiently.

For more insights into handling ADB-related issues, explore our articles on troubleshooting ADB unauthorized devices and managing ADB shell with multiple connected devices.

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