Images of iPhone 4s prototype with Touch ID posted online

Twitter user by name Majin Boo shared photos of the prototype iPhone 4s… The unique smartphone is equipped with a Touch ID fingerprint sensor, which Apple officially began to use two years later.

The images also show the SwitchBoard test operating system, which was used to check the health of the device.

The iPhone 4s was released in 2011. The first smartphone with built-in Touch ID was iPhone 5s

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