Flight Mode; Functions Without A Sim Card - Nokia 6555 User Manual

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A headset, handsfree, loopset, or music stand enhancement is
connected to the phone.
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Flight mode

You can deactivate all radio frequency functions and still have access to
offline games, calendar, and phone numbers. Use the flight mode in
radio sensitive environments—on board aircraft or in hospitals. When
the flight mode is active,
Select Menu > Settings > Profiles > Flight > Activate or Customize.
To deactivate the flight mode, select any other profile.
In the flight mode you can make an emergency call. Enter the
emergency number, press the call key, and select Yes when asked Exit
flight profile? The phone attempts to make an emergency call.
When the emergency call ends, the phone automatically changes to the
normal profile mode.
■ Keypad lock (keyguard)
Select Menu or Unlock (1), and press * (2)
within 1.5 seconds to lock or unlock the
keypad.
If the security keyguard is activated, enter
the security code if requested.
To answer a call when the keyguard is on,
press the call key or open the phone. When
you end or reject the call, the keypad
automatically locks.
For Security keyguard, see Phone, 52.
When the keyguard is on, calls still may be
possible to the official emergency number programmed into your device.
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Functions without a SIM card

Several functions of your phone may be used without installing a SIM
card (for example, the data transfer with a compatible PC or another
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