- From the home screen, tap the Messages icon.
- Tap and hold the conversation with the contact you desire to block.
- Tap Register spam number.
- Tap Yes.
- To unblock a number, tap the Menu icon.
- Tap Spam manager.
- Tap Spam settings.
- Tap Spam numbers.
- Touch and hold the desired number.
- Tap Delete.
- Tap Yes.