When attempting to connect iPhone or iPod touch, you may see one or more of the following error messages:

iTunes could not connect to this iPhone because an unknown error occurred (0xE8000065)
iTunes could not connect to this iPhone because an unknown error occurred (0xE800000a)
iTunes could not connect to this iPhone because an unknown error occurred (0xE800006b)
iTunes could not connect to this iPhone because an unknown error occurred (0xE8000001)

Alternatively, the error may be the same as above but end with a different number.
The following steps may resolve the issue.

Note: This article is for Windows users. If you are not using Windows, please refer to one of the following articles, depending on the product:

Mac computer
iPod touch
iPod

If you are experiencing a symptom where iPhone does not appear in the Source list in iTunes after you connect it to your Windows PC, refer to the troubleshooting suggestions below. Note that iPhone requires a specific minimum version of iTunes.

If you’re having difficulty syncing your contacts or calendars to iPhone or iPod touch with iTunes for Windows via USB, this article can help. Note that this article does not apply to wireless syncing with Exchange ActiveSync or MobileMe.

When syncing contacts, calendars, or notes from Microsoft Outlook, there can be issues that prevent syncing from completing as expected. Many of the issues can be resolved with the steps in these articles:

Troubleshooting iPhone and iPod touch contact and calendar syncing via USB on Windows
MobileMe: Troubleshooting Windows syncing

If you haven’t followed the steps in the appropriate article above please do so. This article provides additional steps that may allow you to sync or detemine why you are unable to sync.

When someone calls, I can’t hear them through the receiver or speaker phone, and I can’t hear music through the speaker. I also can’t be heard by someone who is calling me.