Released on September 19, 2014, this 4.7" screen iPhone is the smaller version of the iPhone 6 Plus. Identifiable by the model numbers A1549, A1586, and A1589.

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Is there any way to replace Home Button while keeping Touch ID?

Hello iFixit community;

I was wondering what causes the home button to lose Touch ID function when replaced. For example, if one were to swap a resistor or capacitor, would this cause the Touch ID to not function? If one were to swap the FPC connector in lieu of another, would Touch ID stop working as well?

I tried searching online for answers but there is not much information on this. All I gather is that if you replace the home button, touch ID no longer works. So my question is when does it stop working? When a single SMD component is replaced or is there a specific component that gives the home button an identity so to speak?

If anybody has any insight to this, please share any information you can and are willing to. Thank you!

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1 Answer

Chosen Solution

The chip. When you think of authentication and/or encryption, always go for the chip, the 'smart' part.

The rest are just accessories, 'stupid' parts.

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I see, and which component on the home button is the chip? There is a schematic on the iPhone but I don't seem to be able to find one for the home button.


For most devices there is an additional NXP controller on the home button cable, but for iPhone 6/6s, there is only one chip, the sensor under the button itself.

You can take a look at the teardown.


Awesome! Thank you!


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