3.1 Introduction3.1.1 Dave drops new Fairphone3.1.3 Red thread3.2 Product life extension3.2.1 Long lasting products3.2.2 Why product life extension?3.2.3 The inertia principle3.3. Case: fairphone3.3.1 The fair phone philosophy3.3.2 Fairphone going circular3.4 Designing longer lasting products3.4.1 Designing longer lasting products (1/3)3.4.2 Six design strategies (2/3)3.4.3 Fairphone demonstration3.4.4 3D-printing and the circular economy (3/3)3.9 In-depth: Planned obsolescence3.9.1 in-depth introduction3.9.2 Planned obsolescence in a circular economy?