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.
Choose General > Restrictions, then tap Enable Restrictions.
Enter a four-digit passcode.
Reenter the passcode.
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.
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.
Turn In-App Purchases off. When enabled, this feature allows you to purchase additional content or features within applications downloaded from the App Store.
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:
Music & Podcasts
Movies
TV Shows
Apps
In the United States for example, to allow only movies rated PG or below, tap Movies, then select PG from the list.
NOTE: Not all countries have rating systems.