12.5 Calls:
In the settings you can choose from the following
options for outgoing and incoming calls:
Send number: Determine whether your phone
number must be shown to the recipients of your
messages or calls.
Call waiting: Determine whether you allow a
second call to be received while already in a call.
You can answer this call be switching conversations
and you can also merge the call with your current
call (conference).
Call forwarding: Determine in which situations
incoming calls must be automatically forwarded to
voicemail or to a different number.
Call barring: Determine in which situations both
outgoing and incoming calls must not be allowed.
Advanced: This option allows you to block
numbers, to enable restricted dialling, to enable
or disable displaying the call duration, to set a limit
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