Apple's foldable iPhone embarked on the P1 (Prototype 1) development phase in June, marking the initiation of a comprehensive journey expected to culminate in the P3 phase by the close of 2025. Subsequently, the device will progress to the EVT (Engineering Verification Test) stage, where rigorous testing of engineering samples will take place. This includes fundamental functionality assessments, parameter evaluations, and specification validations, all aimed at confirming adherence to Apple's stringent design criteria and specifications.