Blocking calls on an iPhone can be a real relief! You can block a number by going to "Phone" app, tapping "Recents," and hitting the "i" icon next to the number. Then, select "Block this Caller." It's quite handy when you need some peace. What prompted you to look into call blocking? Are you getting unwanted calls regularly? I'm here to help if you have any other questions about managing calls on your iPhone!