Rather than look for physical ridges, the scientists' method sweeps through AC frequencies to find the exact electrical impedances of fingertips in contact with the screen.

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With the driver's seat adjusted to accommodate my 6-foot-1-inch frame, I struggled to make contact with the screen buttons, which are incidentally quite small and a little fussy.

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The on screen GUI also provides access to your phone's contact list and allows you to place calls directly from the unit.

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