Nokia NSERIES N73 User Manual

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Contents

Nokia NSERIES N73 User Manual Manual pdf 121 page image

Settings121PIN2 code—This code (4 to 8 digits) is supplied with someSIM cards, and is required to access some functions in yourdevice.Lock code (also known as security code)—This code (5digits) can be used to lock the device to avoid unauthorizeduse. The factory setting for the lock code is 12345. Toavoid unauthorized use of your device, change the lockcode. Keep the new code secret and in a safe placeseparate from your device. If you forget the code, contactyour service provider.Personal unblocking key (PUK) code and PUK2 code—Thesecodes (8 digits) are required to change a blocked PIN codeor PIN2 code, respectively. If the codes are not suppliedwith the SIM card, contact the operator whose SIM card isin your device.UPUK code—This code (8 digits) is required to change ablocked UPIN code. If the code is not supplied with theUSIM card, contact the operator whose USIM card is inyour device.Certificate managementDigital certificates do not guarantee safety; they are usedto verify the origin of software.In the certificate management main view, you can see alist 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 connectto an online bank or another site or remote server foractions that involve transferring confidential information.They should also be used if you want to reduce the risk ofviruses or other malicious software and be sure of theauthenticity of software when downloading and installingsoftware.Important: Even if the use of certificates makes therisks involved in remote connections and softwareinstallation considerably smaller, they must be usedcorrectly in order to benefit from increased security. Theexistence of a certificate does not offer any protection byitself; the certificate manager must contain correct,authentic, or trusted certificates for increased security tobe available. Certificates have a restricted lifetime. IfExpired certificate or Certificate not valid yet is showneven if the certificate should be valid, check that thecurrent date and time in your device are correct.Before changing any certificate settings, you must makesure that you really trust the owner of the certificate andthat the certificate really belongs to the listed owner.View certificate details—check authenticityYou can only be sure of the correct identity of a serverwhen the signature and the period of validity of a servercertificate have been checked.