Security; Phone Software Updates - Nokia 3555 Manual Del Usuario

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Security

When security features that restrict calls are in use (such as call restriction, closed user
group, and fixed dialing) calls still may be possible to the official emergency number
programmed into your phone.
Select Menu > Settings > Security and from the following options:
PIN code request and UPIN code request — to set the phone to ask for your PIN or
UPIN code every time the phone is switched on. Some SIM cards do not allow the
code request to be turned off.
Call restrictions — to restrict incoming calls to and outgoing calls from your phone
(network service). A restriction password is required.
Fixed dialing — to restrict your outgoing calls to selected phone numbers if this
function is supported by your SIM card. When the fixed dialing is on, GPRS
connections are not possible, except while sending text messages over a GPRS
connection. In this case, the recipient's phone number and the message center
number must be included in the fixed dialing list.
Security level > Phone — to set the phone to ask for the security code whenever a
new SIM card is inserted into the phone. If you select Memory, the phone asks for
the security code when the SIM card memory is selected, and you want to change
the memory in use.
Access codes — to change the security code, PIN code, UPIN code, PIN2 code, or
restriction password
Code in use — to select whether the PIN code or UPIN code should be active
Authority certificates or User certificates — to view the list of the authority or user
certificates downloaded into your phone. See "Certificates," p. 30.
Security module settings — to view Security module details, select Module PIN
request, or change the module PIN and signing PIN. See also "Access codes," p. 8.
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Phone software updates

Your service provider may send phone software updates over the air directly to
your device. This option may not be available, depending on your phone.
Warning: If you install a software update, you cannot use the device, even to make
emergency calls, until the installation is completed and the device is restarted. Be
sure to back up data before accepting installation of an update.
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