The iPhone 15 has different dimensions compared to the iPhone 14, so iPhone 14 cases will not fit the iPhone 15. Even though some of the differences in dimensions may seem minor, iPhone cases are made with precision, and even those minor differences are enough to make iPhone 14 cases incompatible with the iPhone 15. However, some users have reported that certain iPhone 14 cases, such as the Otterbox case, fit the iPhone 15 perfectly. Its important to note that the iPhone 15 features contoured edges, an Action button instead of the mute switch, and slimmer bezels around the display, which contribute to the incompatibility of iPhone 14 cases with the iPhone 15. Therefore, it is recommended to purchase cases specifically designed for the iPhone 15 to ensure a proper fit and functionality.