itunes restores iphone firmware to unknown error 1602 solution
Problem Description:
Some users upgrade or restore the iphone, ipad, or ipod touch with itunes, the update or restore process may stop, and itunes displays a warning message "failed to recover IPhone unknown error" followed by error number 1602.
The Connect ITunes screen may also appear on the device:
Reason Analysis:
1602 errors are often caused by USB interface problems, or third-party security software, anti-virus software. In addition, there may be problems with the PC system, the installation of a compact version of the PC system (such as depth, tomato garden and other pirated systems).
Workaround:
First look at the streamlining of the system:
You need to turn on system services that are streamlined and shut down, and then open the Control Panel---> Management tools after you close itunes
---> Services ", Enable messenger,telnet,terminal services, the three service, start the specific method is right-click Service, the Startup type selected as Automatic, and then in the service state point to start.
At this point the general will be able to solve the problem, if not yet, please continue to look down:
Continue to try to correct this error by following these steps:
1. Ensure that the correct USB isolation troubleshooting steps are performed and tested with a known-good cable.
Connect your iPhone, IPad, or ipod touch to other USB ports on your Mac or Windows PC. Compared to hubs, the computer's built-in USB 2.0 ports are preferred. If you have tried to connect the device to a USB port on the front of your computer, try connecting the device to the rear USB port. After you have done this, try to recover the device in ITunes.
If the problem persists, do the following:
(1) Remove all USB devices except the keyboard, mouse and IPhone, IPad or ipod.
(2) Remove all USB hubs and connect your IOS devices directly to your computer. If your monitor has a USB connection, disconnect it from all USB devices.
(3) Bypass the base and connect the device directly to the accompanying USB cable.
(4) Restart the computer.
(5) Try to recover the device in ITunes again.
If possible, test with an alternate known-good USB cable.
2. Follow the steps listed in error 1604.
3. Disable, deactivate, or uninstall Third-party security software, anti-virus software, or firewall software to correct this error.
4. Making sure the phone is in recovery mode before itunes recovery may also solve the problem
itunes restores iphone firmware to unknown error 13 problem resolution
Problem Description:
When you restore the Iphone/ipad firmware using itunes, you may see a 13 error. itunes will now pop up a dialog box indicating that the iphone failed to recover an unknown error (13).
The Connect ITunes screen may also appear on the device:
Reason Analysis:
Error 13 is often caused by an unstable USB interface or a third-party software conflict.
Solution:
1, the implementation of USB isolation fault diagnosis, including the direct insertion of other USB ports on the computer.
Connect your iPhone, IPad, or ipod touch to other USB ports on your Mac or Windows PC. Compared to hubs, the computer's built-in USB 2.0 ports are preferred. If you have tried to connect the device to a USB port on the front of your computer, try connecting the device to the rear USB port. After you have done this, try to recover the device in ITunes.
If the problem persists, do the following:
Remove all USB devices except the keyboard, mouse, and IPhone, IPad, or IPod.
Remove all USB hubs and connect your IOS devices directly to your computer. If your monitor has a USB connection, disconnect it from all USB devices.
Bypass the docking station and connect the device directly to the accompanying USB cable.
Try to recover the device in ITunes again.
If possible, test with an alternate known-good USB cable.
2. Connect a USB 2 hub between the device and the computer.
3, try other USB 30-pin base interface cable.
4, the elimination of third-party security software conflicts.
5. The system may have Third-party software installed to modify the default packet size in Windows by inserting one or more TcpWindowSize entries into the registry.
This error can be caused if the default packet size setting is not correct. Contact the manufacturer of the software that modifies the size of the packet for assistance.
6, connect the computer directly to the Internet source.
Do not use any routers, hubs, or switches. You may need to restart your computer and modem to connect to the network.
7. Try to recover from other known-good computers and networks.
If you find ASR error 1000 in the IPhone, IPad, or ipod update log file, an error occurred while decompressing and transferring the IPSW file that was downloaded during recovery. This error is usually caused by third-party security software interference, a low quality Internet connection that caused IPSW downloads, or a conflict on the USB bus.
itunes restores iphone firmware to unknown error 2 solution
Problem Description:
When you restore the Iphone/ipad firmware using itunes, you may see a 2 error. itunes will now pop up a dialog box indicating that the iphone failed to recover an unknown error (2).
The Connect ITunes screen may also appear on the device:
Reason for occurrence:
Security software made by companies other than Apple ("third party") may prevent communication between iTunes and other Apple applications and resources on the Apple server or PC.
Workaround:
These issues can often be resolved by updating, properly configuring, or uninstalling security software.
1. Verify that the problem is a third-party security software issue.
Some problems may appear to be related to third-party security software, but are actually caused by other circumstances. Before you change your security software, verify the following:
(1) The computer's date, time and timezone are set correctly.
(2) You are logged in as an administrator user.
(3) If your PC or router uses proxy settings, try not to use an Internet proxy.
(4) Run the built-in diagnostics in ITunes, test the connection, and generate a report.
2. Update Security software
Security software companies regularly provide updates to their trusted Web sites and application lists. If you have recently updated or installed a new version of Apple software, such as ITunes or Safari, updating your security software may resolve this issue.
3. Configure security Software
After you update your security software, configure it properly so that iTunes can communicate with Apple. The steps to properly configure your security software may vary, and to find the correct steps, visit the manufacturer's support website or contact them for support.
4. Temporarily deactivate or uninstall security software
If the currently available version of the security software is incompatible with ITunes, you can deactivate the security software and test whether it is the source of the problem. You may need to temporarily uninstall the security software before confirming that you can reinstall the security software and note all the necessary licenses. The reason for a temporary uninstall of security software is that certain portions of a particular security software are still running in the background when they appear to be deactivated.
To reduce any security risks that the security software should block, ensure that all files required for reinstallation are available and disconnected from the network before uninstalling the security software. If this is not possible, for example, if you need to download without active security software, you should only complete this necessary step when there is no security software. For help on viewing the configuration, disabling, or uninstalling the security software, contact the manufacturer.
After you deactivate or uninstall, only the required steps are performed to verify that the problem has been resolved. Perform any required updates, restores, synchronizations, backups, activations, or other tasks for troubleshooting. After the task is complete, install and configure compatible security software to ensure that your PC is protected.
