Apple has released a series of troubleshooting knowledge base articles in case you are having problems with either the iOS4 update of your current iPhone or iPod Touch, or the new iPhone 4.
Here are the links to those articles:
- Troubleshooting iPhone Hardware
- iPhone: Troubleshooting MMS
- Copying personal photos and videos from iPhone, iPad or iPad touch to your computer
- Troubleshooting iPhone, iPad and iPod touch accessories
- iPhone: Unable to use Cellular Data Network services after upgrading to iOS 3.x or iOS4 or later
- How to set up your iPhone, iPad or iPod touch as a new device
- iPhone User’s Guide for iOS4
- iPhone and iPod touch: Syncing Notes
- Mobile Me: Setting up MobileMe Notes syncing between iPhone, iPod touch and Mac
- iPhone and iPod touch: Understanding Gmail Archiving
- iPhone and iPod touch: What to do when an app closes unexpectedly while in use
- Mobile ME: Troubleshooting Find My Phone
- iMovie for iPhone4: FAQ’s
- iBooks: FAQ’s