"Unveiling Project Bongo: The iPhone 15 Pro's Canceled Haptic Buttons Exposed"
Originally Published 2 years ago — by MacRumors
Apple's iPhone 15 Pro was initially planned to feature haptic volume and power buttons as part of Project Bongo, a redesign of the buttons using haptic technology. The haptic buttons would detect pressure and create vibrations to emulate the sensation of pressing a physical button. However, the project was canceled due to unsatisfactory test results and high hardware failure rates. The final mass production units of the iPhone 15 Pro feature standard mechanical buttons instead. Apple may be working on a replacement for the haptic buttons for the iPhone 16 lineup, potentially incorporating capacitive buttons.