Robocalls flooding your cellphone? Here’s how to stop them

An unfamiliar number appears on your cellphone. It is from your area code, so you answer it, thinking it might be important.
There is an unnatural pause after you say hello, and what follows is a recording telling you how you can reduce your credit card interest rates or electric bill or prescription drug costs or any of a number of other sales pitches.
Another day, another irritating robocall. If it feels as if your cellphone has increasingly been flooded with them, you are right.
Ryan Kalember, senior vice president of cybersecurity strategy at Proofpoint, a cybersecurity company in Sunnyvale, California, said the volume of robocalls has seen a “particularly big uptick” since the fall.