Tired of "robocalls"? A new study tests four devices that block unwanted callers

LOS ANGELES (KABC) -- Robocalls can be a nuisance. Some phone telephone companies are starting to prevent automated callers from harassing customers, but there are also a variety of "robo-blocking" tools that consumers can purchase and install.

Watch Consumer Specialist Ric Romero's full report on these devices above.