Sim services – Nokia 3220 User Manual

Page 60

Nokia 3220 User Guide

Phone menu

DIGITAL SIGNATURE

You can make digital signatures with your phone if your SIM card has a security
module. The signature can be traced back to you by the private key on the security
module and the user certificate that was used to perform the signature. To use
the digital signature, can be the same as signing your name to a paper bill,
contract, or other document. See also “Security module” on page 51.

To make a digital signature, select a link on a page, such as the title of the book
that you want to buy and its price. The text to sign (possibly including amount,
date, etc.) will be shown.

Check that the header text is Read and that the digital signature icon

is shown.

Note: If the digital signature icon does not appear, there is a security
breach, and you should not enter any personal data such as your
signing PIN.

To sign the text, read all of the text first; then you can select Sign.

The text may not fit within a single screen. Therefore, make sure to scroll
through and read all of the text before signing.

Select the user certificate you want to use. Enter the signing PIN, and select OK.
The digital signature icon will disappear, and the service may display a confirmation
of your purchase.

• SIM services

In addition to the functions available on the phone, your SIM
card may provide services that you can access in this menu
item, which is shown only if it is supported by your SIM card.
The name and contents of the menu depend on the SIM card.

For availability, rates, and information on using SIM services, contact your SIM
card vendor, for example, the service provider or other vendor.

Depending on the operator, you can set the phone to show you the confirmation
messages sent between your phone and the network when you are using the
SIM services. Select Menu > Settings > Phone settings > Confirm SIM
service actions > Yes.

Note that accessing these services may involve sending messages or making a
phone call for which you may be charged.