How is replacement of the home button done?

you need to take the digitiser screen off as the home button has 2 small tabs that are kept it in place by the screen. then you can take the adhesive strip off the back of the home button and replace it. the button itself comes out easily but the flex that goes through the midframe is a little tricky. you need to lift it to perpendicular and then ease the prongs on the flex through, vice versa for installing. you can just buy the flex or the entire button and flex on various sites. just be careful with the prongs as they are delicate and easily flattened.

if yours isn't working take a look at the prongs first and just see that they aren't flattened-try gently easing them up-might save you taking digitiser off/replacing the button.