Nokia E51 - Device and SIM card security

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Device and SIM card security

To change the PIN code, select

Phone and SIM card

>

PIN code

. The new code must be 4 to 8 digits long. The

PIN code protects your SIM card against unauthorised use

and is provided with the SIM card. After three consecutive

incorrect PIN code entries, the code is blocked, and you

need to use the PUK code to unblock it before you can use

the SIM card again.
To set the keypad to lock automatically after a defined

period, select

Phone and SIM card

>

Keypad autolock

period

.

112

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To set a time-out after which the device is automatically

locked and can be used only if the correct lock code is

entered, select

Phone and SIM card

>

Phone autolock

period

. Enter a number for the time-out in minutes, or

select

None

to set off the autolock period. When the device

is locked, you can still answer incoming calls, and calls may

still be possible to the official emergency number

programmed into your device.
To set a new lock code, select

Phone and SIM card

>

Lock

code

. The preset lock code is 12345. Enter the current code

and then the new code twice. The new code can be 4-255

characters long. Both alphabets and digits can be used,

and both uppercase and lowercase alphabets are possible.

The device notifies you if the lock code is not properly

formatted.
To set the device to ask for the lock code when an

unknown, new SIM card is inserted into your device, select

Phone and SIM card

>

Lock if SIM card changed

. The

device maintains a list of SIM cards that are recognised as

the owners cards.