The rise of smartphones, larger mobile ads spends, and the increased usage of mobile “click to call” by consumers is creating a blind spot for marketers who need to show the full attribution picture of their efforts. The blind spot? Phone calls. How do you fix this problem and shed light on the black hole in your marketing attribution? See our infographic below for some compelling stats on the rise of phone calls and some tactics you can use to eliminate the blind spot in your mobile marketing attribution.