There are some apps that keep a live update of phone numbers of known spammers. I use a company called Metro PCS which is part of the T-Mobile network. Our phones come with an app built in that blocks probably 90-plus percent of all telemarketing calls. While I was reading this thread I got a phone call from the same number 10 times in a row but my phone doesn't even ring but I do get an alert that calls were blocked and it was the same number 10 times in a row but at least I didn't have to deal with it.
Noticed this too, very annoying. Read of a service called Hiya through a podcast episode I heard a while back, but have yet to use it and report personal experience. Be careful of the apps you install, games even. They might be the culprit in some of these robo calls
The bastards claiming to be from the Social Security office have been calling me non-stop this whole week.....driving me nuts. I was trying to take a nap yesterday, and they would call every half hour...ugh!