The Call Manager module in BullGuard Mobile Security can be used to make sure unwanted or unsolicited calls or text messages don't get through to you.
The Blocked tab will list all the numbers you wish to block. Tapping on the blue + button will allow you to add a new number. You can choose to add a number from the Call Log, from the Contacts list or enter the number manually.
Note: Due to changes of the security policies of Android, blocking shortcode numbers is no longer possible for Android 4.4 and higher.
If any of the numbers from the blacklist try to contact you, your phone will not alert you. Instead you will see the blocked attempt in the Logs tab.