Core Viewpoint - The evolution of smartphone materials has shifted from metal and glass to a new composite material, fiberglass reinforced composite, which offers high strength and flexibility while being less fragile than glass [1][10]. Group 1: Material Evolution - The introduction of 5G and wireless charging technologies has led to the decline of metal body designs in smartphones [1]. - Smartphone casing materials have become binary, with low-end models using plastic and high-end models typically featuring metal frames with glass bodies [3]. - Recent trends show that some previously plastic-cased models are upgrading to metal frames and glass backs, while high-end flagship models are less focused on promoting specific types of glass [5][7]. Group 2: New Material Adoption - A new material, fiberglass reinforced composite, is emerging as a popular choice for smartphone backs due to its combination of strength and flexibility [10]. - Different brands are adopting varied marketing strategies regarding this new material, with some avoiding specific mentions and others creating unique names for it [9]. - The historical use of fiberglass reinforced composite in other industries has led to a perception issue, as it is seen as less prestigious compared to traditional glass materials [12][14]. Group 3: Consumer Perception - The lack of "emotional value" associated with fiberglass reinforced composite affects its marketability, as consumers often seek materials that convey a sense of luxury or high status [14]. - Manufacturers tend to use or rebrand this material without highlighting its benefits, as it does not carry the same high-end connotation as other materials like special glass or carbon fiber [12][14].