Apple is introducing a revolutionary new design for the upcoming iPhone 15 Pro models that will replace the traditional mechanical button design with a solid-state design. This change will be made possible through additional Taptic Engines, allowing the ‌iPhone 15‌ Pro models to incorporate a "buttonless design" while still providing physical feedback to users.

This news was first reported by renowned Apple analyst Ming-Chi Kuo, who noted that the volume and power buttons on the two high-end ‌iPhone 15‌ models will adopt a solid-state design, similar to the ‌iPhone‌ 7's home button. This solid-state design will replace a mechanical button design and provide haptic feedback to users. To accommodate this feature, the number of Taptic Engines in each ‌iPhone‌ will increase from one to three.

This news was corroborated by Barclays and analyst Jeff Pu, who noted that the ‌iPhone 15‌ Pro models will feature solid-state volume and power buttons with haptic feedback due to two extra Taptic Engines. Additionally, rumors from 2021 suggested Apple could move back to round volume buttons like the ‌iPhone‌ 4, 4S, 5, and 5S models, leading many to believe this could finally occur this year.

The ‌iPhone 15‌ and ‌iPhone 15‌ Plus are expected to retain traditional clickable volume and power buttons, while the ‌iPhone 15‌ Pro models are also rumored to feature a titanium frame, USB-C port, new Sony image sensors, periscope telephoto camera technology, 8GB of memory, and a 3nm "A17 Bionic" chip.

This revolutionary "buttonless design" is sure to be an exciting addition to the iPhone 15 Pro models, and one that will set them apart from their predecessors.

It is expected that the new solid-state button design will provide a more seamless and natural user experience, with haptic feedback providing users with the physical feedback they are used to from mechanical buttons. Furthermore, it is believed that the addition of two extra Taptic Engines will also provide users with a more powerful haptic experience than what has been seen in previous generations.

While details of the exact implementation of this solid-state design are still emerging, it is clear that Apple is looking to innovate with this new design and create a more immersive and intuitive user experience. We can only wait and see what other features will be included in the ‌iPhone 15‌ Pro models when they are officially announced.