If you have an iPhone 5, there are a few ways to block numbers. The first is to use the phone’s built-in number blocker. This will prevent calls from being made to that number. The second way is to use a third-party app. There are many options out there, and you can find one that best suits your needs by checking the app’s website or searching for it on the App Store. The third way is to use a virtual assistant like Siri or Google Now. These assistants can help you block numbers by asking questions about the person or number being called and then providing information about how to block them.