BenQ S660C - Manual (Page 159)

Menus 145
Call Barring
You can request that your network operator block the dialing
or receiving of certain calls. The call barring services below
require the support of your network operator. To activate or
cancel any of the options below, you must enter the network
password provided by the network operator.
All Outgoing
Blocks dialing of any calls from the phone.
Intl. Out
If this option is activated, no international calls can be
made with your phone.
Intl. Except Home
If this option is activated, your phone can only be used to
dial local calls and calls to your home country from
abroad. Other international calls will be barred.
All Incoming
Rejects all incoming calls.
Incoming When Roaming
If you are in another country (using roaming), activating
this option will cause the phone to reject all incoming
calls.
Cancel All
Cancels all call barring settings. You must enter the
network password in order to cancel these settings.