iMore

So I don't have an iPhone 7/7 plus but my wife does. I recently purchased a 6 plus with a broken screen and got it fixed. I paid to get it fixed even though I was pretty sure I could do it. Only reason I did was because I was worried I would mess up the home button therefore no longer having Touch ID. I was talking to a friend about him getting a new 7 plus, and for some reason it got me wondering. So the new home button is built into the screen right? What happens if that screen needs to be replaced. Is the home button still tied to the processor for security reasons, or is that no longer a thing?