The 6G physical layer is poised to transform the wireless landscape, forming the basis for unprecedented innovation and global connectivity. By combining robust physical layer fundamentals with trustworthy, standardized AI integration and scalable testing methodologies, the industry is well- positioned to deliver a 6G platform that is not only highly performing and intelligent, but also dependable and future ready. The physical layer foundations described in this paper will enable this transformation, laying the groundwork for the next decade of mobile innovation.