Research findings from the Pew Research Center suggest that over 80% of Americans ignore their phones when an unknown number calls. The most common reasons for people to screen calls are fears of scams and not wanting to take calls related to work or matters that might impact their daily routine. Receiving calls from unfamiliar numbers can be frustrating and annoying, and in some cases, it can also be intimidating. If you are getting a lot of calls from an unknown number, or the same number keeps calling, it’s wise to learn how to block unknown callers.