Nokia Lumia 822 - How can I remove a number from the blocked list in the call+SMS filter app?

  1. Go to the call+SMS filter application.
  2. Select the blocked numbers.
  3. Long-tap the contact or phone number you are removing.
  4. Select unblock.

Note:  After a number or contact is removed from the blocked numbers list, calls and text messages from this number are no longer blocked.