One of the latest rumours about the next iPhones has to do with its volume and power buttons. Analyst Ming-Chi Kuo claims Apple will switch out physical buttons for solid-state power and volume buttons. These will function similarly to the Touch ID sensor on the iPhone 7 or the iPhone SE (2022). It uses two additional Taptic Engines on the left and right sides of the frame. Solid-state buttons mean these won't physically sink into the device when pressed. Instead, you get haptic feedback to confirm presses.
These new buttons will be limited to the iPhone 15 Pro, Pro Max, and Ultra models (depending on what will be launched). The standard iPhones will retain the physical buttons.