There is a wide gap between the fortunes of small-scale and large farmers. Large farmers have better access to credit, resources, risk reduction mechanisms and information. Could the adoption of smartphones create new opportunities to reduce rural inequalities in developing economies by addressing these asymmetries and boosting the incomes of small farmers? Mobile broadband offers the scope for access to the types of information needed to improve crop yields, which have a far more powerful effect on small farmers’ incomes than information about market prices. But many existing agricultural information services may not be sustainable. Policy makers will need to work in partnership with commercial developers to enable viable business models – in effect, an agricultural extension services model for the mobile broadband era.