If you have a modern smartphone, there's a good chance you deal with spam on a fairly regular basis. Indeed, for some, "robocalls" and other similar scam calls are a daily (if not hourly) annoyance.
Some phone makers, such as Google, have rolled out protective measures to help customers better detect these fake calls on the phone software side, but similar free options on the carrier side are beginning to crop up now.
Today, Verizon rolled out a free "Call Filter" service to both iOS and Android users. In short, the Filter will warn you ahead of time that a given call might be spam - if it detects such a call, you'll be given options to block the number, report it, or ignore the warnings and take it anyway.
It should be noted that the specific capabilities of Call Filter will vary from phone to phone. As you can see above, the iPhone XS Max offers "spam lookup" functionality whereas Samsung's Galaxy S10e does not.
As robocalls become increasingly common, features like Call Filter from major US carriers will become all the more important. The fact that this feature is completely free is a nice touch, and hopefully, it will prevent Verizon users (particularly those who aren't as tech-savvy as others) from getting scammed quite as often.