Nokia 8801 - Manual (Page 79)

S I M s e r v i c e s
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17. SIM services
Your SIM card may provide additional services that you can access.
This menu 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 service provider.
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 by selecting the
option
Yes within the menu Confirm SIM service actions , in Phone settings .
Note that accessing these services may involve sending messages or making a
phone call for which you may be charged.