<ul><li>Apple is still working on perfecting the technology of solid-state haptic buttons for iPhones.</li><li>The delay in launching the buttons is due to registering false touches and lower responsiveness.</li><li>Apple is focusing on improving the tactile design and reliability of the buttons for a satisfying user experience.</li><li>The buttons have the advantage of programmability and increased durability without mechanical wear.</li></ul>

Apple is apparently still working on solid-state haptic buttons for iPhones

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