Ann154, provided a great link for you to use. Being able to block a number on your phone is important for me as well. With regard to your concern why were you looking to block a number from your device? We do have another service which allows you to screen your calls prior to answering or mark them as spam calls using our caller name Id service. Here is a link to review https://www.verizonwireless.com/solutions-and-services/caller-name-id/.
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