BlackBerry provides a menu so you can still make phone calls even though the BlackBerry in a locked state. Here are the steps you can do:
For BlackBerry Software 4.0:
1. Select Options menu on your BlackBerry
2, Select Security Options
3. In the Allow Outgoing Calls While Locked, select Yes
For BlackBerry Software 4.1 or 4.5:
1. Select Options menu on your BlackBerry
2, Select the General Settings
3. In the Allow Outgoing Calls While Locked, select Yes
Software For BlackBerry 4.6 s / d 5.0:
1. Select Options menu on your BlackBerry
2, Choose a Password
3. In the Allow Outgoing Calls While Locked, select Yes