Hello,

We have taken apart a few 4S's.

What we have found:

Home button itself is the same, however the flex cable attached to it is completely different. You can not swap the flex cables between the two and have it work, due to the screen.

And doing a screen swap from the 4S to the 4 will not work, due to physical differences, and locations of flex cables and components.

Hope this helps,

Xico Solutions

So does that mean it is more reliable than the i4's as I have heard it being not responsive Is quite common and am worried my 4s will eventually suffer from this too.

With the slight modification on the flex-cable for the iPhone 4S, it appears Apple heard us and fixed the issue. But I cannot guarantee that it won't suffer from the same problem the 4 had after a period of use. So far, I'm not seeing any problems with my 4S' home button :)

Can anyone else confirm that a iphone 4 Home button Flex can not be used on the Iphone 4S, I don't see any difference in the flex itself.

Flex is not same 100%!!

can I use an iPhone 4 home button in an iPhone 4s, just the button? because the 4 button does have the little metal square piece? thanx

I just order the iphone 4 cable and it doesnt fit. I seems to be too big? what could be the problem?

I'm a local repair shop in Brazil, I installed a lot of iphone 4s flex on iphone 4, but no the other way around. This seems like a perfect solution for the problems with design on the iphone 4 home button.

Again you can use the i4s flex on i4!!! it works perfectly!!