Nokia Lumia 521 - How can I block phone calls and text messages using the call+SMS filter app?

Turn on Block calls+SMS on the call+SMS filter app.

  1. Go to Phone on the Start Screen.
  2. On the call history, long-tap the phone number or contact you want to block.
  3. Select block number.. in the drop-down menu.
  4. The phone will ask you to confirm
  5. If you agree, the phone number will be added to the blocked list.

or

  1. Go to Messaging.
  2. On the threads, long-tap the phone number or contact you want to block.
  3. Select block number.. from the drop down menu.
  4. The phone will ask you to confirm.
  5. If you agree, the phone number will be added to the blocked list.

After the phone number is added to the blocked number list, you won't be getting any calls or text messages from that number on your Lumia from now on.

Note: You can't block MMS or IM messages with the call+SMS filter app.