User Guide

Change a keyboard layout: In Settings, choose General > International > Keyboards
and select a keyboard. You can make separate selections for both the on-screen
software and external hardware keyboards for each language.
The software keyboard layout determines the layout of the keyboard that appears on
the iPhone screen. The hardware keyboard layout determines the virtual layout of an
Apple Wireless Keyboard connected to iPhone.
Set the date, time, and telephone number formats: Choose General > International >
Region Format, and choose your region.
The Region Format also determines the language used for the days and months that
appear in native iPhone apps.
Set the calendar format: Choose General > International > Calendar, and choose
the format.
Accessibility
To turn on accessibility features (iPhone 3GS or later), choose Accessibility and choose
the features you want. See Chapter 29, “Accessibility,” on page 235.
Proles
This setting appears if you install one or more proles on iPhone. Tap Proles to see
information about the proles you’ve installed.
Resetting iPhone
Reset all settings: Choose General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and
calendars) and media (such as songs and videos) aren’t aected.
Erase all content and settings: Connect iPhone to your computer or a power adapter.
Choose General > Reset and tap “Erase All Content and Settings.”
This resets all settings to their defaults and erases all your information and media:
 On iPhone 3GS or later: by removing the encryption key to the data (which is
encrypted using 256-bit AES encryption)
 On iPhone 3G: by overwriting the data
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 or later, the encryption key is removed immediately.)
Reset network settings: Choose General > Reset and tap Reset Network Settings.
When you reset network settings, your list of previously used networks and VPN
settings not installed by a conguration prole are removed. Wi-Fi is turned o and
then back on, disconnecting you from any network you’re on. The Wi-Fi and “Ask to
Join Networks” settings are left turned on.
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Chapter 25 Settings