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The Region Format also determines the language used for the days and months that
appear in native iPhone applications.
Accessibility
To turn on accessibility features (available only on iPhone 3GS), choose Accessibility
and choose the features you want. See Chapter 25, “Accessibility,” on page 182.
Resetting iPhone
Reset all settings: Choose General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information, such as your contacts and
calendars, and media, such as your songs and videos, aren’t deleted.
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: by removing the encryption key to the data (which is encrypted
using 256-bit AES encryption)
• On iPhone and 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, the removal of the encryption key is immediate.)
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 conguration prole 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.
To remove VPN settings installed by a conguration prole, choose Settings > General
> Prole, then select the prole and tap Remove.
Reset the keyboard dictionary: Choose General > Reset and tap Reset Keyboard
Dictionary.
You add words to the keyboard dictionary by rejecting words iPhone suggests as you
type. Tap a word to reject the correction and add the word to the keyboard dictionary.
Resetting the keyboard dictionary erases all words you’ve added.
Reset the Home screen layout: Choose General > Reset and tap Reset Home Screen
Layout.
Reset the location warnings: Choose General > Reset and tap Reset Location
Warnings.
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Chapter 19 Settings