Apple tests iPhone Duo 2 with under-display Face ID and new Action button

Apple is testing iPhone Duo 2 prototypes with under-display Face ID and a new Action button, addressing common hardware complaints from the first folding model. The current iPhone Duo relies on a side fingerprint sensor due to space constraints, but engineers are shrinking infrared components to fit facial recognition under the outer screen. A customizable Action button is also being considered for the folding lineup. Prototype testing does not guarantee final production, but it signals Apple's roadmap to fix first-generation issues, potentially offering a significant upgrade for buyers dissatisfied with the current fingerprint scanner.