Nokia was once the dominant player in the mobile phone market but saw a decline as smartphones emerged. It failed to effectively manage the transition to the smartphone era. Nokia's change management approach did not fully follow the PROSCI model, lacking key elements like stakeholder engagement and reinforcing change. This contributed to Nokia being unable to transform quickly enough to compete against competitors like Samsung that adapted faster to new technologies and customer demands. Nokia's experience highlights the importance of a robust change management process for organizations undergoing major technological or market shifts.