Digital signature
You can make digital signatures with your phone if your SIM card has a security module. Using the digital signature can be the same as signing your name to a paper bill, contract, or other document.
1.To make a digital signature, select a link on a web page, for example, the title of a book you want to buy and its price. The text to sign, which may include the amount and date, is shown.
Check that the header text is Read and that the digital signature icon 
is shown.
2.To sign the text, read all of the text first, and select Sign.
The text may not fit within a single screen. Therefore, ensure that you scroll through and read all of the text before signing.
3.Select the user certificate you want to use. Enter the signing PIN. The digital signature icon disappears, and the service may display a confirmation of your purchase.
16. SIM services
Your SIM card may provide additional services. You can access this menu only if it is supported by your SIM card. The name and contents of the menu depend on the available services.
For availability and information on using SIM card services, contact your SIM card vendor. This may be the service provider or other vendor.
Accessing these services may involve sending messages or making a phone call for which you may be charged.
17. PC connectivity
You can send and receive mail, and access the internet when your phone is connected to a compatible PC through a Bluetooth or a data cable connection. You can use your phone with a variety of PC connectivity and data communications applications.
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