Apple iPhone/iPhone 3G (User manual) - Manual (Page 126)

Info Screen
Tap any application in a list to see more information, such as the application’s price,
reviews, and other information.
If you’ve already installed the application, “Installed” appears instead of the price on
the Info screen.
Email a link to the application’s Info page in iTunes: Tap “Tell a Friend” near the
bottom of the Info screen.
Read reviews: Tap Reviews near the bottom of the Info screen.
Report a problem: Tap “Report a Problem” near the bottom of the Info screen. Select a
problem from the list or type optional comments, then tap Report.
126 Chapter 9 iTunes and App Store