Facebook‘s Mark Zuckerberg and Sheryl Sandberg were bullish about mobile ads and the apps that help drive them during the company’s Q1 earnings call today. Facebook posted revenue of $1.46B for the quarter, up 38% from $1.06B in the same period last year. Earnings excluding items were $312M, or 12 cents a share, a penny shy of Wall Street estimates. Mobile ads accounted for almost 30% of ad revenue in the quarter, up from 23% in Q4 2012. Total revenue from ads was $1.25B, up 45%. The company had an average of 665M daily active users in March, up 26% year-over-year, and 751M mobile monthly users, up 54%. The social media company’s numbers follow its recent unveiling of Facebook Home, a software-only adaptation that will “turn your Android phone into a great social device” — that also eventually will sell more mobile ads.  Facebook’s share price is flat in after-hours trading.