Baseband ?
I think i dont have to tell you ( i think you are an very experienced guy on your own already) that 28 errors are pointing on an Hardware issue if you already tryed so much things to fix it .
Error 20, 21, 23, 26, 28, 29, 34, 37
These errors typically occur when security software interferes with the restore and update process. Follow
Troubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on another computer, the device may need service.
Symptoms
Security software manufactured by companies other than Apple ("third party") can prevent iTunes and other Apple applications from communicating with Apple servers or resources on your computer. Symptoms may include:
- Unable to launch iTunes
- iOS device, iPod, or Apple TV not seen in iTunes
- Unable to connect to, purchase, or download iTunes Store content
- Unable to activate, backup, update or restore iOS device or iPods using iTunes
- Unable to sync content with an iOS device, iPod, or Apple TV
- Unable to use Home Sharing with other computers, iOS devices, or Apple TV
- iTunes or computer performance issues while an iOS device is connected, syncing, or backing up
- Unable to sync with iOS devices using a Wi-Fi connection
You often can resolve these issues by updating,
correctly configuring, or uninstalling security software.
Resolution
Expand All Sections | Collapse All Sections
1. Verify that the issue is a third-party security software issue.
There are some issues that may appear to be related to third-party security software, but may be caused by other circumstances. Before making changes to your security software:
Note: For steps to identify if your security software is blocking a particular port, see the
Advanced Steps under the Additional Information section of this article.
2. Update your security software
Security software companies regularly provide updates to their trusted site and application lists. If you have recently updated or installed new versions of Apple software, such as iTunes or Safari, updating your security software may resolve the issue. To update your security software, first determine what security software you have installed.
Here are some means of determining what applications you have installed on your PC:
- Click the Start menu (or button) and read through the list of programs.
- Check the notification area (the lower-right corner of the task bar) for security applications.
- Browse installed applications under Control Panel > Add/Remove.
On a Mac, open the Finder and look in /Applications and /Applications/Utilities.
Find what security software is installed and update it to the latest available version. This may be possible through the application itself, but when in doubt,
contact the manufacturer for assistance. Use the following list to identify software you may have installed on your system and to locate available updates.
After updating your security software, run a virus scan.
List of third-party security applications
3. Configure your security software
After updating your security software, configure it correctly to allow iTunes to contact Apple. The steps used to properly configure the security software will vary, and to find the exact steps, visit the manufacturer's support website or otherwise contact them for assistance.
Useful information for configuring your security software:
IMPORTANT: iTunes must be allowed to contact Apple using the following ports and servers:
- port 80
- port 443
- phobos.apple.com, deimos3.apple.com, albert.apple.com, gs.apple.com, itunes.apple.com, ax.itunes.apple.com
For a more complete list of ports used by Apple products see
"Well known" TCP and UDP ports used by Apple software products.
iTunes also contacts VeriSign servers during an iPhone restore and activation:
- evintl-ocsp.verisign.com
- evsecure-ocsp.verisign.com
For more information see
iOS: Resolving update and restore alert messages.
4. Temporarily disable or uninstall your security software
If the current available version of your security software is incompatible with iTunes, you can disable the security software and test if it is the source of the issue. However, a temporary deinstallation might be required because parts of some security software remain active in the background though they appear to be deactivated. Only temporarily uninstall security software after making sure you can reinstall it and have noted any required licenses.
To reduce any security risks that security software is designed to prevent, consider making sure all files needed to reinstall it are available and disconnect network connections before uninstalling security software. Should this not be possible, such as updating or restoring an iOS device, that required step should be the only process completed without security software. For assistance in checking your configuration, disabling, or uninstalling your security software, please contact the manufacturer.
Once disabled or uninstalled, perform only the steps required to verify your issue has been resolved. Complete whatever update, restore, syncing, back up, activation, or other task you were troubleshooting. Once that task is complete, install and configure compatible security software to ensure your computer is protected.
Additional Information
If you have an issue trying to update or restore your iOS device with iTunes as in
this article, try deleting the software restore file or .ipsw file from the location outlined in
iTunes: Specific update-and-restore error messages and advanced troubleshooting and re-downloading it with security software uninstalled. Refer back to the article for further steps to resolve restore issues.
There are a number of issues that may appear to be caused by third-party security software, but have another cause. If you receive a specific alert message, search the
apple.com/support for alternative resolutions before adjusting security settings. If the steps in an article you find do not resolve the issue then troubleshoot your security software.
"Unable to connect to the iTunes Store" alerts may be due to a variety of reasons other then security software. To learn more, see the steps in
Can't connect to the iTunes Store. For a list of other iTunes Store alerts on a PC, see
iTunes for Windows: Possible iTunes Store errors.
Even if all necessary ports for a particular feature are open by your PC's security software, you may need to configure your security software to allow specific services to run. For more information about these processes see
Background processes installed with iTunes for Windows.
iTunes: Troubleshooting security software issues
Products Affected
iTunes
Symptoms
Security software manufactured by companies other than Apple ("third party") can prevent iTunes and other Apple applications from communicating with Apple servers or resources on your computer. Symptoms may include:
- Unable to launch iTunes
- iOS device, iPod, or Apple TV not seen in iTunes
- Unable to connect to, purchase, or download iTunes Store content
- Unable to activate, backup, update or restore iOS device or iPods using iTunes
- Unable to sync content with an iOS device, iPod, or Apple TV
- Unable to use Home Sharing with other computers, iOS devices, or Apple TV
- iTunes or computer performance issues while an iOS device is connected, syncing, or backing up
- Unable to sync with iOS devices using a Wi-Fi connection
You often can resolve these issues by updating,
correctly configuring, or uninstalling security software.
Resolution
Expand All Sections | Collapse All Sections
1. Verify that the issue is a third-party security software issue.
There are some issues that may appear to be related to third-party security software, but may be caused by other circumstances. Before making changes to your security software:
Note: For steps to identify if your security software is blocking a particular port, see the
Advanced Steps under the Additional Information section of this article.
2. Update your security software
Security software companies regularly provide updates to their trusted site and application lists. If you have recently updated or installed new versions of Apple software, such as iTunes or Safari, updating your security software may resolve the issue. To update your security software, first determine what security software you have installed.
Here are some means of determining what applications you have installed on your PC:
- Click the Start menu (or button) and read through the list of programs.
- Check the notification area (the lower-right corner of the task bar) for security applications.
- Browse installed applications under Control Panel > Add/Remove.
On a Mac, open the Finder and look in /Applications and /Applications/Utilities.
Find what security software is installed and update it to the latest available version. This may be possible through the application itself, but when in doubt,
contact the manufacturer for assistance. Use the following list to identify software you may have installed on your system and to locate available updates.
After updating your security software, run a virus scan.
List of third-party security applications
3. Configure your security software
After updating your security software, configure it correctly to allow iTunes to contact Apple. The steps used to properly configure the security software will vary, and to find the exact steps, visit the manufacturer's support website or otherwise contact them for assistance.
Useful information for configuring your security software:
IMPORTANT: iTunes must be allowed to contact Apple using the following ports and servers:
- port 80
- port 443
- phobos.apple.com, deimos3.apple.com, albert.apple.com, gs.apple.com, itunes.apple.com, ax.itunes.apple.com
For a more complete list of ports used by Apple products see
"Well known" TCP and UDP ports used by Apple software products.
iTunes also contacts VeriSign servers during an iPhone restore and activation:
- evintl-ocsp.verisign.com
- evsecure-ocsp.verisign.com
For more information see
iOS: Resolving update and restore alert messages.
4. Temporarily disable or uninstall your security software
If the current available version of your security software is incompatible with iTunes, you can disable the security software and test if it is the source of the issue. However, a temporary deinstallation might be required because parts of some security software remain active in the background though they appear to be deactivated. Only temporarily uninstall security software after making sure you can reinstall it and have noted any required licenses.
To reduce any security risks that security software is designed to prevent, consider making sure all files needed to reinstall it are available and disconnect network connections before uninstalling security software. Should this not be possible, such as updating or restoring an iOS device, that required step should be the only process completed without security software. For assistance in checking your configuration, disabling, or uninstalling your security software, please contact the manufacturer.
Once disabled or uninstalled, perform only the steps required to verify your issue has been resolved. Complete whatever update, restore, syncing, back up, activation, or other task you were troubleshooting. Once that task is complete, install and configure compatible security software to ensure your computer is protected.
Additional Information
If you have an issue trying to update or restore your iOS device with iTunes as in
this article, try deleting the software restore file or .ipsw file from the location outlined in
iTunes: Specific update-and-restore error messages and advanced troubleshooting and re-downloading it with security software uninstalled. Refer back to the article for further steps to resolve restore issues.
There are a number of issues that may appear to be caused by third-party security software, but have another cause. If you receive a specific alert message, search the
apple.com/support for alternative resolutions before adjusting security settings. If the steps in an article you find do not resolve the issue then troubleshoot your security software.
"Unable to connect to the iTunes Store" alerts may be due to a variety of reasons other then security software. To learn more, see the steps in
Can't connect to the iTunes Store. For a list of other iTunes Store alerts on a PC, see
iTunes for Windows: Possible iTunes Store errors.
Even if all necessary ports for a particular feature are open by your PC's security software, you may need to configure your security software to allow specific services to run. For more information about these processes see
Background processes installed with iTunes for Windows.
Advanced Steps
Security software may block certain ports that are used by iTunes and other Apple software. If you are a network or computer administrator, you may want to manually find out if certain ports used by Apple software are blocked. See
Well known TCP and UDP ports used by Apple software products. Depending on what issue you are having, you can use that article to find out which ports are used by the application or function that is not working properly. Then, follow the below steps to find out whether that port is accessible on your computer or not.
Testing basic connectivity between two computers or devices:
- Find the IP address of the Mac, PC, Apple TV, or device you are trying to connect to. Note that many iTunes features that communicate with other computers and devices such as AirPlay, AirTunes, Home Sharing, and Remote require that all computers and devices involved be connected to the same network and same subnet.
- For Mac: Open System Preferences and type "IPv4" into the search field in the upper-right corner of the window and press Return. Note the IPv4 address. (An example is 10.0.1.35)
- For Windows: Choose Start > Run, then type "cmd". Press return to open a Windows Command Prompt. (For Windows Vista and Windows 7, type "cmd" in the search bar then press the return key.) Type "ipconfig", then press Return key. The IP address of the computer you are viewing is displayed next to the line "IPv4 Address". Note this. (An example is 10.0.1.35)
- For Apple TV: Go to the Settings menu on Apple TV, select General > Network. The IP address is displayed.
- For iPhone, iPad, or iPod touch connected via Wi-Fi: Tap Settings > Wi-Fi, and tap the blue arrow next to the Wi-Fi network you are connected to. The IP address will be displayed.
- Use Ping to test the basic network connection between your primary computer and the computer or device you are connecting to.
On Mac OS X:
From the Finder, click the Go menu and choose Utilities. Open Network Utility and click the "Ping" tab. Enter the IP address you noted above and click the Ping button. This will confirm that basic network communication with the destination IP address is working. If this fails, you have a basic network connection issue to diagnose See this article for more details on troubleshooting your network connection. Here is an example of a successful ping test:
Here is an example of an unsuccessful ping test:
On Windows:
Choose Start > Run, type "cmd", and press Return to open a Windows Command Prompt. (For Windows Vista and Windows 7, type "cmd" in the search bar and press Return.) Type "ping exampleIP" (without quotations and instead with the IP address you noted above). Press Return; this will confirm that basic network communication with the destination IP address is working. If this fails, you have a basic network connection issue to diagnose. See this Microsoft article for more information. Here is an example of a successful ping test:
Here's an example of an unsuccessful ping test:
Testing specific port communication between two computers or devices:
If you know basic network connectivity is working from using the steps above, the steps below will test specific ports. See
Well known TCP and UDP ports used by Apple software products. Depending on what issue you are having, you can use the article to find out which ports are used by the application or function that is not working properly. Then, follow the below steps to find out if that port is accessible on your computer or not:
1.) Test ports on your local computer:
2.) Test port availability on a different computer on your network:
This document will be updated as more information becomes available.
Important: Mention of third-party websites and products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Apple assumes no responsibility with regard to the selection, performance or use of information or products found at third-party websites. Apple provides this only as a convenience to our users. Apple has not tested the information found on these sites and makes no representations regarding its accuracy or reliability. There are risks inherent in the use of any information or products found on the Internet, and Apple assumes no responsibility in this regard. Please understand that a third-party site is independent from Apple and that Apple has no control over the content on that website. Please
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