worthless. allows every sort of robo call, spam and random call through, !00% of time. since switching over to AT&T, nearly 65% of all calls received on any given day are SPAM and/or automated. The solution I was offered by AT&T customer care was to buy the full-on version and pay for a service that has failed to do what it claims it will, already. "Booooo, AT&T!" Bad form