Nokia SGH-D830 - Manual (Page 11)

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Offline mode
You can switch the phone to Offline mode, in
which the phone functions requiring network
connection are deactivated. This mode is
helpful when you want to use your phone in
a place where you are not allowed to use
mobile devices, such as in an airplane and at
a hospital.
To switch to Offline mode, press <Menu>
and select Settings → Phone settings →
Offline mode → On.
In Offline mode, you can use non-wireless
functions, such as games, calendar, camera,
and music player.
Keys and display
Keys
Perform the function indicated
on the bottom line of the
display.
In Idle mode, access your
favourite menus directly.
 p. 85
In Menu mode, scroll through
menu options.
In Idle mode, launch the web
browser.
In Menu mode, select the
highlighted menu option or
confirm input.
Make or answer a call.
In Idle mode, retrieve numbers
recently dialled, missed, or
received.