Have you noticed an increase of robocalls and telemarketers ringing your smartphone at all hours of the day? You’re not alone.

The FCC estimates companies make over 2.4 billion robocalls every month. According to Consumer Reports, American consumers filed 1,837,558 complaints about robocalls in just the first 11 months of 2013. The numbers have increased significantly over the past four years.

These calls aren’t just bothersome, they could be costly. Robocalls come with some real-dollar payoffs for scammers. Companies are looking to charge people for unnecessary servi…