Nokia 002J3X4 User Manual - Page 139

Security and data management To decrypt the device memory, select Phone memory. To decrypt the memory card without destroying the encryption key, select Memory card > Decrypt. To decrypt the memory card and destroy the encryption key, select Memory card > Decrypt and turn off encryption. you do not have the code, contact your service provider. To cancel the service, select Options > Deactivate fixed dialling. Tip: To send text messages to the SIM contacts while the fixed dialling service is active, you need to add the text message centre number to the fixed dialling list. Fixed dialling Select Menu > Contacts and Options > SIM contacts > Fixed dial contacts. With the fixed dialling service, you can restrict calls from your device to certain phone numbers. Not all SIM cards support the fixed dialling service. For more information, contact your service provider. When fixed dialling is activated, calls may be possible to the official emergency number programmed into your device. 1. To restrict calls from your device, select Options > New SIM contact, and enter the contact name and phone number to the list of numbers to which calls are allowed, or select Add from Contacts to copy the contact from the contacts list. To restrict calls by a country prefix, enter the country prefix in the list of numbers. All phone numbers to which calls are allowed must start with this country prefix. 2. Select Options > Activate fixed dialling. You need your PIN2 code to activate and deactivate fixed dialling or edit your fixed dialling contacts. If 138 Certificate manager Select Menu > Control panel > Settings and General > Security > Certificate management. Digital certificates are used to verify the origins of software but do not guarantee safety. There are four different types of certificates: authority certificates, personal certificates, trusted site certificates, and device certificates. During a secure connection, a server may send a server certificate to your device. Upon receipt, it is checked through an authority certificate stored in your device. You receive notification if the identity of the server is not authentic or if you do not have the correct certificate in your device. You can download a certificate from a web site, or receive a certificate as a message. Certificates should be used when you connect to an online bank or a remote server to transfer confidential information. They should also be used if you want to reduce the risk of viruses or other malicious software, and to check the authenticity of software when you download and install software to your device. © 2009 Nokia. All rights reserved.