iPhone 4 - Click to enlarge

iPhone 3GS - Click to enlarge

Apple has just released the iPhone User Guide for iOS4. It is an 18MB download of a 244 page PDF file. It covers all the areas you’ll need from the basics of getting started, syncing, file sharing and then goes through all the iPhone’s functions like the Phone, Mail, Safari, iPod, Messages (SMS/MMS), Calendar, Photos, Camera, YouTube, Stocks, Maps, Weather, Voice Memos, Notes, Clock, Calculator, Settings, the iTunes Store, Compass, Contacts, Nike + iPod, iBooks, Accessibility, Support and other Information.

The Guide covers the use of iOS4 on the iPhone 3G, 3GS and 4. There has been one for each of the previous iPhones and I’ve found these user guides to be a really good reference to have available when your stuck trying to figure out how to do something with your iPhone. You can download the PDF User Guide from this link.