About call blocking
The blocked calling feature allows you to block all incoming calls or block incoming calls only when roaming. You can also block all outgoing calls and all outgoing international calls, or you can block outgoing international calls only when roaming.
To use the blocked calling feature, your BlackBerry® device must use a SIM card, and your wireless service provider must set up your SIM card for this service and provide you with a call blocking password. Depending on your wireless service provider and wireless network, this feature might not be supported.