Apple iPhone OS 3.1 - Manual (Page 167)

App Store
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About the App Store
You can search for, browse, review, purchase, and download applications from the App
Store directly to iPhone. Applications you download and install from the App Store on
iPhone are backed up to your iTunes library the next time you sync iPhone with your
computer. You can also install applications you’ve purchased or downloaded through
iTunes on your computer when you sync with iPhone.
Note: The App Store is not available in all regions.
To use the App Store, iPhone must be connected to the Internet. See “Connecting to
the Internet” on page 40. You also need an iTunes Store account (not available in some
countries) to download applications. By default, iPhone gets your iTunes Store account
settings from iTunes. If you don’t have an iTunes Store account, or if you want to make
purchases from another iTunes Store account, go to Settings > Store. See “Store” on
page 159.
Browsing and Searching
Browse the featured selections to see new, notable, or recommended applications,
or browse Top 25 to see the most popular applications. If you’re looking for a specific
application, use Search.
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