O-RAN is discussed by many, demonstrated by fewer, and deployed by an even smaller number of operators. In this session we will discuss mobile network evolution and set out why we believe O-RAN is a promising enabler of innovation. We will discuss some of the complexities involved in turning an O-RAN platforms up and share our views on the need for integration of the disaggregated and explain why we think this is a multi-dimensional challenge that needs to be solved before operators will deploy in larger numbers.