Nokia N77 - Инструкция по эксплуатации - Страница 110

Settings

110

Personal identification number (PIN) code—This code 
protects your SIM card against unauthorized use. The PIN 
code (4 to 8 digits) is usually supplied with the SIM card. 
After three consecutive incorrect PIN code entries, the 
code is blocked, and you need the PUK code to unblock it.

UPIN code—This code may be supplied with the USIM 
card. The USIM card is an enhanced version of the SIM 
card and is supported by UMTS mobile phones.

PIN2 code—This code (4 to 8 digits) is supplied with some 
SIM cards, and is required to access some functions in 
your device.

Lock code (also known as security code)—This code (5 
digits) can be used to lock the device to avoid 
unauthorized use. The factory setting for the lock code is 

12345

. To avoid unauthorized use of your device, change 

the lock code. Keep the new code secret and in a safe 
place separate from your device. If you forget the code, 
contact your service provider.

Personal unblocking key (PUK) code and PUK2 code—
These codes (8 digits) are required to change a blocked 
PIN code or PIN2 code, respectively. If the codes are not 
supplied with the SIM card, contact the network service 
provider.

UPUK code—This code (8 digits) is required to change a 
blocked UPIN code. If the code is not supplied with the 
USIM card, contact the network service provider.

Certificate management

Digital certificates do not guarantee safety; they are used 
to verify the origin of software.

In the certificate management main view, you can see a 
list of authority certificates that are stored in your device. 
Press 

 to see a list of personal certificates, if available.

Digital certificates should be used if you want to connect 
to an online bank or another site or remote server for 
actions that involve transferring confidential information. 
They should also be used if you want to reduce the risk of 
viruses or other malicious software and be sure of the 
authenticity of software when downloading and installing 
software.

Important:

 Even if the use of certificates makes the 

risks involved in remote connections and software 
installation considerably smaller, they must be used 
correctly in order to benefit from increased security. The 
existence of a certificate does not offer any protection by 
itself; the certificate manager must contain correct, 
authentic, or trusted certificates for increased security to 
be available. Certificates have a restricted lifetime. If 

Expired certificate

 or 

Certificate not valid yet

 is shown 

even if the certificate should be valid, check that the 
current date and time in your device are correct.