Understanding iTunes/iPhone Error 4037

When attempting to update or restore your iPhone via iTunes, you may encounter error 4037. This error usually appears with a message stating, “The iPhone [device name] could not be restored. An unknown error occurred (4037).” This typically happens due to:

  • Firmware Issues: The firmware being used for the update or restore is incompatible or corrupted.
  • Connection Problems: Issues with the USB connection between your iPhone and the computer.
  • Software Conflicts: Third-party software interfering with the update or restore process.
  • Outdated Software: The iTunes software or iOS version is outdated.

itunes error 4037

Download repair tool

Sometimes resolving the errors is out of our control and possibilities. This is where third-party tools are more than welcome to contribute and carry all the difficulties away. If you are facing error 4037 or similar issues, but fail to benefit from any of the manual steps below, try using Tenorshare ReiBoot — a great recovery tool designed for resolving errors like that. Get to know how one can use it to address the errors and restore or update an iOS device successfully on their website.

Download iOS Repair Tool
  1. Download and install ReiBoot for either Mac or Windows.
  2. Once done, open the app and plug your device into the computer.
  3. The program should recognize your device and offer a couple of options.
  4. Choose Standard if you simply want to update your device, or Deep repair if you want to fully restore it.
  5. Then, download the firmware found by the app for your smartphone by clicking Download.
  6. Once the process is finished, click Repair now to start resolving the problems.
  7. Standard is meant to search for basic issues and bugs to address them without wiping out your data.
    Deep repair will reset your device to factory settings and delete the entire data stored on it.

  8. Wait until the app finishes its repair and restores your device. It will take about 15 minutes to end.

Step-by-Step Instructions to Fix iTunes/iPhone Error 4037

Step 1: Unlock Your Device

Ensure that your iPhone is unlocked before connecting it to iTunes. If the device is locked, iTunes may not be able to access it, leading to error 4037.

Step 2: Restart Your iPhone and iTunes

Restarting both your iPhone and iTunes can resolve many software-related issues. Turn off your iPhone and computer, then turn them back on and try the update or restore process again.

Step 3: Check Your Internet Connection

A stable internet connection is crucial for the update or restore process. Ensure that your computer is connected to a reliable network. You can test your connection by opening a web browser and navigating to a website.

Step 4: Update iTunes

  1. Open iTunes: Launch the iTunes application on your computer.
  2. Check for Updates:
    • On Windows: Go to the menu bar at the top and select Help > Check for Updates.
    • On Mac: Go to the menu bar and select iTunes > Check for Updates.
  3. Install Updates: If an update is available, follow the on-screen instructions to install it.

Step 5: Update macOS or Windows

  1. Mac Users:
    • Open the Apple menu and select System Preferences.
    • Click on Software Update and install any available updates.
  2. Windows Users:
    • Open Settings and go to Update & Security.
    • Click on Check for updates and install any available updates.

Step 6: Check USB Connections

  1. Use an Official Apple Cable: Ensure you are using an official Apple USB cable.
  2. Try a Different USB Port: Connect your iPhone to a different USB port on your computer.
  3. Eliminate Hubs: Connect your iPhone directly to the computer without using a USB hub.

Step 7: Disable Security Software

Sometimes, third-party security software can interfere with the update or restore process. Temporarily disable any antivirus or firewall software on your computer and try the update or restore process again.

Step 8: Put iPhone in Recovery Mode

  1. Connect iPhone to Computer: Use a USB cable to connect your iPhone to your computer.
  2. Open iTunes: Launch iTunes if it doesn’t open automatically.
  3. Force Restart Your iPhone:
    • On iPhone 8 or later: Quickly press and release the Volume Up button, quickly press and release the Volume Down button. Then, press and hold the Side button until you see the recovery mode screen.
    • On iPhone 7 and 7 Plus: Press and hold the Volume Down button and the Sleep/Wake button at the same time. Keep holding them until you see the recovery mode screen.
    • On iPhone 6s and earlier: Press and hold both the Home button and the Sleep/Wake button at the same time. Keep holding them until you see the recovery mode screen.
  4. Update or Restore:
    • In iTunes, you should see a message offering to Update or Restore. Choose Update to reinstall iOS without erasing your data. If Update doesn’t work, try Restore.

Step 9: Use a Different Computer

If possible, try using a different computer to update or restore your iPhone. This can help determine if the issue is specific to the original computer.

Step 10: Contact Apple Support

If none of the above solutions work, it might be time to contact Apple Support for further assistance. They can provide more specific troubleshooting steps tailored to your situation.


iTunes/iPhone error 4037 can be frustrating, but it is often resolvable with a few troubleshooting steps. Updating software, checking USB connections, disabling conflicting software, and putting your iPhone in recovery mode are effective ways to fix this error. If all else fails, reaching out to Apple Support is your best bet for a resolution.

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James Kramer
Hello, I'm James. My website Bugsfighter.com, a culmination of a decade's journey in the realms of computer troubleshooting, software testing, and development. My mission here is to offer you comprehensive, yet user-friendly guides across a spectrum of topics in this niche. Should you encounter any challenges with the software or the methodologies I endorse, please know that I am readily accessible for assistance. For any inquiries or further communication, feel free to reach out through the 'Contacts' page. Your journey towards seamless computing starts here