If you want to block a number on your iPhone 6s, there are a few different ways to go about it.

  1. Open the Phone app and tap on the contacts icon.
  2. Select the person or number you want to block and press the “Block” button in the top right corner of their contact card.
  3. If you want to unblock someone later, just open the Phone app and tap on their contact card again. This time, press the “Unblock” button in the top right corner of their contact card. ..