Apple MB384LL/A, MC555LL/A, MB048LL/A, MB496SL/A, MB046LL/A, MB717LL/A Usage, Network, Settings 143

•IMEI (International Mobile Equipment Identity) and ICCID (Integrated Circuit Card

Identifier, or Smart Card) numbers

•Modem firmware version of the cellular transmitter

•Legal information

•Regulatory information

Usage

Show battery percentage: Tap Usage and turn Battery Percentage on to display the percentage of battery charge next to the battery icon in the upper-right corner of iPhone (iPhone 3GS only).

See your usage statistics: Choose Usage. There, you can see:

•Usage—Amount of time iPhone has been awake and in use since the last full charge. iPhone is awake whenever you’re using it—including making or receiving phone calls, using email, sending or receiving text messages, listening to music, browsing the web, or using any other iPhone features. iPhone is also awake while performing background tasks such as automatically checking for and retrieving email messages.

•Standby—Amount of time iPhone has been powered on since its last full charge, including the time iPhone has been asleep.

•Current period call time and lifetime call time.

•Amount of data sent and received over the cellular data network.

Reset your usage statistics: Tap Usage and tap Reset Statistics to clear the data and cumulative time statistics. The statistics for the amount of time iPhone has been unlocked and in standby mode aren’t reset.

Network

Use the Network settings to configure a VPN (virtual private network) connection, access Wi-Fi settings, or turn Data Roaming on or off.

Enable or disable 3G: Tap to turn 3G on or off.

Using 3G loads Internet data faster in some cases, but may decrease battery performance. If you’re making a lot of phone calls, you may want to turn 3G off to extend battery performance.

Turn Data Roaming on or off: Choose General > Network, then turn Data Roaming on or off.

Data Roaming turns on Internet and visual voicemail access over a cellular data network when you’re in an area not covered by your carrier’s network. For example, when you’re traveling, you can turn off Data Roaming to avoid potential roaming charges. By default, Data Roaming is turned off.

Chapter 19    Settings

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