Nguyên nhân của lỗi 3194 khi restore iphone và cách khắc phục


If your computer can’t communicate with"s software update server, you might see one of these messages.

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Error 17Error 1639Errors 3000-3020Error 3194Errors 3100-3999This device isn"t eligible for the requested build

If you see one of these messages and need help updating or restoring your ios or iPadOS device, make sure your Mac is up-to-date.If you"re using iTunes, install the latest version of iTunesand try to lớn update or restore your device again. If you still can"t update or restore, follow the steps below.

If you have TCP/IP filtering, firewall, or security software installed on your computer, try these steps.

Bypass your internet router. Some routers might block iTunes from accessing the update server. If you"re using a router that isn"t manufactured by, try the following:Disconnect from your wired or wireless router và use an Ethernet cable to lớn connect your computer directly lớn your modem.Restart your computer and modem. Liên hệ your internet service provider for instructions on using your modem.

After you confirm your mạng internet connection is working, try khổng lồ update or restore your quả táo or iPadOS device again.

Restore or update from another computer

Try to lớn restore or update on another computer with a different internet connection. This helps to make sure there aren"t issues with your computer that might stop itfrom communicating with the update server.

Errors 1639, 3000-3020, and 3100-3999 (with the exception of 3194) are sometimes caused by your network settings. If your computer uses a managed network, refer lớn your network administrator. Proxies, firewalls, and other network security measures can cause these errors. If necessary, find a different network connection to restore the device. For example, if you"re restoring at work, try to lớn restore at home or on a friend"s computer và network.

Check your hosts file

After you update your Mac or iTunes khổng lồ the latest version, check the hosts file to make sure your computer can contact the update server.


If you’re using a Windows computer, follow the steps from theMicrosoft tư vấn site. Resetting the hosts tệp tin affects software services that rely on hosts tệp tin redirects. If you"re using Windows on a business computer, consult your IT department khổng lồ be sure applications work correctly after you reset your hosts file.


If you"re using a Mac, follow these steps:

1. In the Finder, choose Applications > Utilities.

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2. Xuất hiện Terminal.

3. Type this command & press Return:

sudo nano /private/etc/hosts4. Enter the password you use to sign in to your computer và press Return. You won"t see text appear in the Terminal window when you type your password.

5. Navigate using the arrow keys & look for an entry containing “”.

If you don"t see any entry containing, then the hosts file isn"t related to lớn the issue. Close the Terminal và go to lớn the "Address TCP/IP filtering, firewall, or security software" section of this article.

6. Add the # symbol and a space ("# ") to the beginning of the entry.

7. Press Control-O lớn save the file.

8. Press Return when asked for the filename.

9. Press Control-X khổng lồ exit the editor.

10. Restart your Mac.

After your computer is finished restarting, try lớn update or restore your ios or iPadOS device again.