Touch volume controls, which should be similar to the MacBook’s touchpad, where vibration creates tactile feedback and feels like they’re being pressed, will not be on the new iPhones.
Texas-based Apple supplier Cirrus Logic said in a recent shareholder letter that the product, which it previously stated is scheduled for the fall, will not launch. It was this company that had to tinker with new “buttons” for adjusting the volume and locking the device.
Rumors of the appearance of touch buttons on the iPhone 15 have been circulating for a long time: Well-known Apple analyst Ming-Chi Kuo had previously stated their presence based on analysis of the main suppliers of Apple parts. However, Kuo later mentioned unresolved technical issues that would cause such control buttons to be removed from the iPhone 15 Pro and Pro models. As confirmed by a recent report.
Source: Ferra

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