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My fingerprint sensor on my iPhone 5s is not working, but the home button is working. I want to replace the fingerprint sensor. Is it possible to just buy a new fingerprint sensor - home button assembly and replace it, and will it just work? I heard stories that fingerprint sensor is somehow hard wired with the motherboard and no other fingerprint sensor can replace the original one. Is this true?

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The only way to replace or repair the fingerprint sensor is for Apple to do it for you.

It is tied to the secure enclave in the CPU & any unauthorised tampering will disable it.

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