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You can switch the device on with no SIM card inserted, in
which case the device starts up in the offline mode, and you
cannot use the network-dependent phone functions.
To switch the device off, press and hold the power key.
Lock the keys
When the device or keypad is locked, calls may be possible to
the official emergency number programmed into your
device.
The keypad of your device locks automatically to prevent the
keys from being accidentally pressed. To change the period
after which the keypad is locked, select Menu > Tools >
Settings > General > Security > Phone and SIM card >
Keypad autolock period.
To lock the keys manually in the standby mode, press the left
selection key and *.
To unlock the keys, press the left
selection key and *.
Tip: To lock the keys in the
menu or in an open
application, press the power
key briefly, and select Lock
keypad. To unlock, press
the left selection key and *.
Display indicators
The device is being used in a GSM network (network
service). The bar next to the icon indicates the signal strength
of the network at your current location. The higher the bar,
the stronger the signal.
The device is being used in a UMTS network (network
service).
The battery charge level. The higher the bar, the stronger
the charge in the battery.
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