Final answer:
Apple primarily follows a focused business to consumer model in selling iPhones, targeting individual consumers directly and creating a unique user experience.
Step-by-step explanation:
The business model that Apple primarily follows in selling iPhones is a focused business to consumer model. This means that Apple's main target audience is individual consumers, and they design and market their products directly to these end users. By focusing on the needs and preferences of individual consumers, Apple aims to create a direct connection with their customers and provide them with a unique and desirable user experience.