My Home Button was 8 on the 10 times unresponsive,
i found out some software tricks to re-calibrate it but it didn't worked out, so i assumed it was a hardware issue. As a iPhone in Belgium costs about 600 euro's (contracting phones is illegal in Belgium, so it must be unlocked) and sending it to a repair is 400 euro's.
I need to it twice.
everything was well explained how to dismantle everything and the old home button. but there was no explanation how to reattach the new home button properly. so had to reopen it after and fix it again. after the second attempt it was like a brand new iPhone.
Be VERY careful disconnecting this antenna, i advice to try not to disconnect that part, very difficult to reconnect !!! Breaks easily !!.
also home button install is not really well explained at the end of the user guide. so be sure the connectors are touching the clip very good !!!
and last point. when reinstalling the logic bord be sure the logic bord is put in his right perfect place or you'll be having problems closing the back panel
Flathead 3/32" or 2.5 mm Screwdriver
SIM Card Eject Tool
iPhone 4/4S Liberation Kit