Robocalls rank among the most persistent and aggravating of scamming tactics. These incessant phone calls have gone unchecked for so long that the Federal Trade Commission received a whopping 500,000 complaints just last month. Unfortunately, this figure has become the average monthly complaint rate. Try as we might, our efforts to ignore robocalls have proven futile. These dubious scammers remain resolute on their quest to infiltrate mobile devices and extract personal information. If you’ve been a victim of robocalls a time or two, here are some tips of how to rid these spoof phone numbers from your missed call log.