How to fix unknown error when restore iPhone 4 with iTunes

When you using the iTunes to restore iPhone 4, occured the error 1601, 3194, 3004, 1004, 2005, how to fix? Following is a brief fixes.

Occurred an unknown error 1601

Find the Control Panel ==> Administrative Tools ==> Services, three services, telnet, messenger, terminal, select Auto, and click below application, click Start, click OK.
An unknown error 3194
Modify C:\Windows\System32\drivers\etc\hosts, you can use Notepad to open.
Option One: Add 74.208.10.249 gs.apple.com inside
Option Two: Add #74.208.10.249 gs.apple.com inside
Option Three: Add the following content inside

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a ‘#’ symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost
Note: Win7 users may not modify because of a permissions issue, right click on “Properties” of hosts; select your current logged on user, click “Edit”. Select your current user, find the “right” and check all , click application, and then OK. To modify the hosts.

These three cases can fix the error 1601, you can turn the test, until success, I have not met via these three plans still occur an error 1601.
Modified complete, please restart the computer and iOS device.

Unknown error 3004
Check your network environment, simply change the network environment and then restore.

Unknown error 1004
Found C:\Windows\System32\drivers\etc\hosts, you can open the text.
Check whether there are 74.208.10.249 gs.apple.com, if it exists directly delete or rename the file.

An unknown error 2005
The restored firmware error or your data cable issue, replace the firmware or data line

Lei Cao
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  • LindeeT

    Hi my phone is jailbroken and i was updating to the OS7. I got the error
    3194. made the line add now got the error 3004. What do you mean by
    ‘change the network environment’? I am not really computer savvy and do
    not know what this means any help you could give me would be great.
    thanks