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Digital signature
You can make digital signatures with your phone. Using the digital signature can 
be the same as signing your name to a paper bill, contract or other document. 
To make a digital signature, select a link on a page, for example, 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.
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 and 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. Key in the signing PIN (see Access 
codes on page 16) and press OK. The digital signature icon will disappear, and the 
service may display a confirmation of your purchase.