How to Fix Error 4, 6, 1630-1641, 3000-3999, Or 9000-9999

When you see iTunes Errors 4, 6, 1630–1641, 3000–3999, or 9000–9999 on your iPhone, iPad, or iPod touch, it means your device cannot connect to iTunes store successfully or be recognized by iTunes. These errors also mean that your iPhone cannot be backed up, restored, updated, synced or activated, or you can’t connect to iTunes Store to download or buy content you want.

According to the Apple Support Center, this happens when there’s an incompatible issue between iTunes and your security software. To fix this issue, you may need to change the setup of your security software or iTunes at the same time.

If you see error 9006 on your device, it might not be able to connect to Apple servers. So, check for communication issues between iTunes and Apple software update servers. But, if you still see this error message, the following steps will teach you how to check your connectivity and security software.

How to Resolve Issues Between iTunes and Third-Party Security Software

Third-party security software made by companies other than Apple can actually prevent iTunes from connecting to Apple servers or to devices. So, most times, any of these numeric error messages that pop up when you try to sync, update, back up, or restore your device can be fixed by changing the setup of your security software or iTunes at the same time.

However, before changing the security software's setup, take the following steps:

  • Make sure that the date, time, and time zone are set correctly on your computer.
  • Log in to an administrative user account, not a guest account.
  • Make sure that you have the latest version of iTunes.
  • Update OS X or Windows.
  • Update your security software.
  • If your device isn’t recognized, find more information on what to try if your iPhone, iPad, or iPod isn’t recognized in iTunes for Mac or Windows.

If you’re still having trouble, continue to the next section.

Test Your Connectivity

  • Check your hosts file to make sure that it’s not blocking iTunes from communicating with Apple’s servers.
  • If you’re having issues using AirPlay, Home Sharing, iTunes, or Remote, check the connectivity between the computers or other devices you have. They should be connected to the same network and subnet in order to function properly.

If you’re still having trouble, continue to the next section.

Test Your Security Software

If you still have trouble after you test your connectivity, your security software could be interfering with your computer’s connection with iTunes.

In some cases, you might need to temporarily remove your security software to isolate an issue. Because some Internet security apps don’t uninstall completely, you might need to download and run a cleanup utility for your security software for a complete removal.

If you're still having trouble, continue to the next section.

Check Your Windows Firewall

If you don’t add iTunes as an exception, your Windows Firewall might prevent iTunes from connecting to the Internet. To make sure that the firewall on your Windows PC isn’t blocking iTunes, follow these steps:

  1. Press the Windows key on your keyboard. If your keyboard doesn’t have a Windows key, press the Control (Ctrl) and Escape (Esc) keys.
  2. Click the magnifying icon or search field. In the search field, enter firewall.cpl.
  3. Click firewall.cpl in the search results. The Windows Firewall window opens.
  4. For Windows 10 and 8, click “Allow an app or feature through Windows Firewall” or “Allow a program or feature through Windows Firewall” (for Windows 7), then click “Change settings.”
  5. Make sure that iTunes is selected for both private and public networks and that Bonjour is selected for private networks only.
  6. If iTunes or Bonjour isn’t listed, click “Allow another app” (Windows 10 and 8) or “Allow another program” (Windows 7).
  7. If iTunes isn't listed, click Browse and then go to the iTunes program, which is in C:\Program Files\iTunes\.
  8. If Bonjour isn't listed, click Browse and then go to mDNSResponder, which is in C:\Program Files\Bonjour\.
  9. After selecting one of the programs, click Open.
  10. Click Add in the Add an app window (Windows 10 and 8) or Add in the Add a Program window (Windows 7).
  11. In the Allowed apps (Windows 10 and 8) or Allowed Programs (Windows 7) window, click OK.
  12. Close the Windows Firewall window.