Robocalls are becoming a real life problem in the era of smartphones. In April alone, almost 20 million robocalls were made in Milwaukee alone.

TODAY’S TMJ4 decided to take a closer look at where these calls come from, and why they’re so relentless. We’ll look at the science of robocalls, and how callers can set up a computer to dial 10,000 numbers a second.

We will also break down some common myths about robocalls, while looking at the legality of them. Finally, we tackle spoof calling, or making a robocall look like its coming from one of your loved ones.

Follow along all day Tuesday as we battle robocalls on TODAY’S TMJ4 and

To see which calls are legal or to file a complaint, click here.