"No Call List" . This is the best defense against getting unwanted call. I find it annoying that I have to pay extra 8 dollars a month to block my phone number because of telemarketers. They always seem to call at the most inconvinient time. But, if the somehow end up with your phone, there's a Reverse Phone Lookups. I don't know about you, but I really like getting to know the number that shows up on my caller ID. Especially the hang ups. Those annoy me the most. Thank goodness for this new technology, I can at least figure out where a call is coming from.