Troubleshooting Guide: How to Fix iPhone Error 21 and Restore Your Device

Encountering an iTunes error 21 or iPhone Error 21 can be frustrating, especially when you’re trying to restore your iPhone. This error often prevents the successful completion of the restoration process, causing inconvenience and uncertainty. However, there are several solutions available to help you resolve this issue and restore your iPhone without data loss. In this comprehensive guide, we will explore various methods to fix iTunes error 21 or iPhone Error 21 and get your device back up and running smoothly.

I. Understanding iTunes Error 21 (iPhone Error 21):

1. Causes of iTunes Error 21:
   • Unfinished installation of iTunes software or corrupted iTunes software.
   • Registration issues or corruption in the Windows registry related to iTunes.
   • Windows system file corruption caused by viruses or malware.
   • Accidental deletion of files linked with iTunes by another program.
2. Impact of iTunes Error 21:
   • Prevents the successful restoration, update, or download of your iPhone.
   • Displays a popup window with the message: “The iPhone could not be restored. An unknown error occurred (21).”

II. Solutions to Fix iTunes Error 21 or iPhone Error 21:

1. Restart iTunes:
   • Ensure a reliable USB cable, computer, and network connection.
   • Quit iTunes and relaunch it to reset any temporary faults or malfunctions.
   • Verify if the error persists after restarting iTunes.
2. Update iTunes:
   • Check for updates in iTunes by going to “Help” > “Check for Update.”
   • Install the latest version of iTunes from the official Apple website.
   • Updating iTunes can resolve compatibility issues and fix errors.
3. Check Third-Party Security Software:
   • Disable any third-party security software, such as antivirus programs, temporarily.
   • These security software might interfere with the connection between iTunes and your iPhone during the restore process.
4. Use iMyFone iOS System Recovery (Advanced Solution):
   • iMyFone iOS System Recovery is a reliable third-party tool that can fix iTunes and iPhone errors, including Error 21, without data loss.
   • It automatically detects and repairs various iOS system problems.
   • Connect your iPhone to the computer, launch the iMyFone iOS System Recovery tool, and follow the instructions to fix the error.
5. Use Dr.Fone – System Repair:
   • Dr.Fone – System Repair is another software that can fix iTunes error 21 or iPhone Error 21 without data loss.
   • It offers an easy-to-use interface and ensures the safety of your data during the repair process.
   • Follow the steps provided by Dr.Fone – System Repair to resolve the error effectively.

III. Best Practices and Additional Tips:

• Ensure a stable internet connection during the restoration process to avoid interruptions.
• Use a reliable USB cable and avoid unnecessary USB devices.
• Keep your iTunes software up to date to prevent compatibility issues.
• Regularly scan your computer for viruses and malware to maintain system integrity.
• Back up your iPhone regularly to safeguard your data.

Conclusion: Encountering iTunes error 21 or iPhone Error 21 while restoring your iPhone can be frustrating, but with the right solutions, you can resolve the issue and successfully restore your device. This guide has provided several methods to fix iTunes error 21, including restarting iTunes, updating the software, checking security software, and utilizing third-party tools like iMyFone iOS System Recovery and Dr.Fone – System Repair. By following the recommended steps and best practices, you can overcome the error and restore your iPhone without losing any data.

Remember to always keep your iTunes software updated, maintain a secure computer environment, and perform regular backups to ensure the smooth functioning of your iPhone. With these solutions and tips at your disposal, you can confidently troubleshoot and fix iTunes error 21 or iPhone Error 21, enabling you to enjoy the full functionality of your device once again.