E-commerce continues to grow quickly with people shopping across a variety of devices, but often times there is no comparison to talking with a live person. Phone calls are still an important channel for research and purchasing, with 70% of mobile searchers reporting they click to call directly from the search results to connect with a business. In fact, Google ads drive over 40 million calls each month. As a critical component of today’s digital path to purchase, it’s important for businesses to understand how, when, and why consumers use click to call features.
Source: http://adwords.blogspot.com/2013/09/new-research-shows-that-70-of-mobile.html
70% of mobile searchers click-to-call from search results