The biggest opportunity in mobile right now isn’t on smartphones

Facebook has noticed something that other companies would do well to heed: The biggest opportunity right now isn’t in smartphones, where users are bombarded by the fruits of an ever-more-competitive market for apps and mobile services. Rather, the big play for some companies, especially any that wish to expand into emerging markets, is on the “dumbphones”—aka non-smartphones, or in industry parlance, feature phones—that most people in rich countries have now left behind.