Left a message some B S about lowering my electric bill, they are now blocked! They lower your rates for a month or two then charge you triple. these crooks are under investigation by the state but I hope it's not by the same folks who enforce the DNC law :(
About a year ago, I started saving all these no-answer calls into a contact titled ZZZ, I now have 127 numbers. Scarcely once a month or two do I ever get a repeat call. I know this because my display will show that ZZZ called. A duplicate call from the same number is a very rare occurrence so simply blocking them, makes no difference.