Learn to identify your iPhone model. To ensure that your Mac or PC is compatible with your iPhone, check the system requirements for your model.

This article explains how to get started with VoiceOver on the following Apple products:

iPhone 3GS
iPad
iPod touch (3rd generation)

This article explains how to use iTunes to back up, update, or restore your iPhone, iPad, or iPod touch.
Read an overview on updating. Read more detailed information about backing up.
To get the best results, always make sure you have the latest version of iTunes installed and running before attempting to update or restore your device.

When using a POP email account with multiple devices, email messages may only appear on the first device that receives them. This occurs when an email client is configured to automatically remove email from the server once an email client has received it. You can configure your email client (or clients) either to keep a copy of the email on the server, remove it after a certain number of days have passed, or keep it until you move it from your Inbox.

When syncing All-Day events from an iPhone, iPad, or iPod touch to Outlook, some events may be spanned over two days in the Outlook calendar. When syncing events from Outlook to an iPhone, iPad, or iPod touch, events might appear moved by one day on the device. This occurs after updating to iTunes 9.1.