Apple iPhone OS 3.1 - Manual (Page 146)

Important: You can’t use iPhone while data is being overwritten. This can take up to
two hours or more, depending on the model and storage capacity of your iPhone.
(On iPhone 3GS, the removal of the encryption key is immediate.)
Restrictions
You can set restrictions for the use of some applications and for iPod content on
iPhone. For example, parents can restrict explicit music from being seen on playlists,
or turn off YouTube access entirely.
Turn on restrictions:
1 Choose General > Restrictions, then tap Enable Restrictions.
2 Enter a four-digit passcode.
3 Reenter the passcode.
Turn off restrictions: Choose General > Restrictions, then enter the passcode.
Tap Disable Restrictions, then reenter the passcode.
If you forget your passcode, you must restore your iPhone software from iTunes.
See “Updating and Restoring iPhone Software” on page 204.
Set application restrictions: Set the restrictions you want by tapping individual
controls on or off. By default, all controls are on (not restricted). Tap an item to turn it
off and restrict its use.
Safari is disabled and its icon is removed from the Home screen. You cannot use Safari
to browse the web or access web clips. Other third-party applications may allow web
browsing even if Safari is disabled.
YouTube is disabled and its icon is removed from the Home screen.
The iTunes Store is disabled and its icon is removed from the Home screen. You cannot
preview, purchase, or download content.
The App Store is disabled and its icon is removed from the Home screen. You cannot
install applications on iPhone.
Camera is disabled and its icon is removed from the Home screen. You cannot take
pictures.
Location data isn’t provided to applications.
Restrict purchases within applications: Turn In-App Purchases off. When enabled,
this feature allows you to purchase additional content or features within applications
downloaded from the App Store.
Set content restrictions: Tap Ratings For, then select a country from the list. You can
then set restrictions using that country’s ratings system for the following categories of
content:
146 Chapter 19 Settings