am getting error code -23 while updating ios5 ..pls help

Hi, I faced the same problem too but as I have read somewhere that the root cause is actually the e-bbook file that is present in yr iTunes folder that makes iTunes could not update the phone.

I deleted the files and restart the system and it works fine. Now i am on iOS5.

Though some says its hardware problem but I surely hope that is not the case for yours. Try it, hope it works for you..

Anuar Subari

can you kindly explain how do you delete this file that you mention? thanks

Try restoring the iOS device if backing up anderasing all content and settings doesn't resolve the issue. Using iTunes to restore iOS devices is part of standard isolation troubleshooting. Restoring your device will delete all data and content, including songs, videos, contacts, photos, and calendar information, and will restore all settings to their factory condition.

Before restoring your iOS device, Apple recommends that you either sync with iTunes to transfer any purchases you have made, or back up new data (data acquired after your last sync). If you have movie rentals on the device, see iTunes Store movie rental usage rights in the United States before restoring.

Follow these steps to restore your device:

1. Verify that you are using the latest version of iTunes before attempting to update.
2. Connect your device to your computer.
3. Select your iPhone, iPad, or iPod touch when it appears in iTunes under Devices.
4. Select the Summary tab.
5. Select the Restore option.
6. When prompted to back up your settings before restoring, select the Back Up option (see in the image below). If you have just backed up the device, it is not necessary to create another.

Hi, I've just manually updated mine SUCCESSFULLY! Make sure you SYNC ALL your data first 🙂

This was the method I used (courtesy of http://www.nickpan.com/2011/10/15/iphone-ios5-upgrade-unknown-error-23/):

1. Download the iOS5 manually. See http://osxdaily.com/2011/10/12/ios-5-download-available/
2. Copy the iOS5 file to (For Windows 7 users) “C:\Users\YourUsername\AppData\Roaming\Apple Computer\iTunes\iPhone Software Updates”.
3. Go back to iTunes and hit “Update”.

I had the same problem when trying to download iOS5 to my iPhone4. Then I turned off my firewall (Systems preferences/ Security/ Firewall) and it works fine now.