<p>We investigated the role of Information and Communication Technologies (ICT, namely mobile phones) in support of citizen agency and its potential in calling for authorities’ accountability. We focused on Eastern Africa and we used a mixed methodology, which allowed us to explore the current uses of ICT to strengthen accountability and to forecast the growth of mobile phones’ adaption in that region. Evidence from both analyses suggests that there are two main areas where citizen agency and ICT can reinforce each other in bottom-up and horizontal processes: participation and engagement of citizens, and the diffusion of information.</p>