When you block calls, you can block all incoming or all outgoing calls,
and all incoming or all outgoing calls when roaming. Contact your wireless service
provider for more info on blocking specific phone numbers. Depending on your wireless service provider, this feature might not be supported.
Note: If you have BlackBerry Mobile Voice System installed on your device or you have multiple phone lines, you
might have to select a specific phone line first.
The first time that you turn on call blocking, you will be prompted to create a password
to lock your call blocking settings. To change your call blocking password, complete
steps 1 and 2, and tap