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Re: How do I block unknown callers? Other discussions were locked without answers

But why I need to pay for additional services in order to do that *77 used to do.?  That doesn't make sense.  My phone blocks numbers without need for additional services that I pay for.  All I want to do it block unknown callers, blocked callers, etc., which used to happen when you dial *77.  $5.00 extra per month?  ¿Por qué?