The iPhone 15 Pro and Pro Max could swap mechanical volume and power buttons for solid-state switches that use haptic feedback instead. that is according to Apple analyst Ming-Chi Kuowhich says the buttons could function like the solid-state home button first released on the iPhone 7 that you can’t physically press, but vibrate in response to touch.

In a tweet, Kuo explains that Apple will need to add Taptic Engines to the left and right sides of the two high-end iPhone 15 models to “provide force feedback to make users feel like they’re pressing physical buttons.” This would bring the number of Taptic engines in the iPhone 15 from one to three. Kuo doesn’t mention the base iPhone 15 or the iPhone 15 Plus, so these two models can keep the same click-power and volume buttons.