revenues were a bit better than expected at $1.18 billion. but disappointed investors dumped the shares in after-hours trading. facebook fell as much as 9% to $24. erika miller reports. mobile is a huge opportunity for facebook. our goal is to connect everyone in the world. and over the next five years, we expect four billion or five billion people to have smart phones. reporter: finally, investors got a chance to hear facebook c.e.o. mark zuckerberg discuss his company s business strategy. he told investors that the social network now has 955 million users, a near-30% increase in just one year. facebook s biggest challenge is figuring out how to adapt to the growing use of mobile technology. nearly all of facebook s revenues come from advertising, and that s more difficult with smaller screens. that s part of the reason facebook shares have gotten crushed they re down nearly 30% from the offering price of $38 in may. but some analysts still think the stock s a buy.