How to replace Home button in iPhone 4/4S

In order to replace the button you have to disassemble almost the entire phone.

Step 1. Switch to silent mode:

Step 2. Remove the pentalobe screws from the bottom end of the phone:

Step 3. Remove the cover by pushing it forward:

Step 4. Gently remove the back cover from the cellphone body:

Step 5. Remove the screw by the lower left corner of the battery:

Step 6. Using plastic instrument, remove the battery from the cellphone body:

Step 7. Pull the strip to recover the battery:

Step 8. Next in line is the SIM card, remove it using a paper clip, included with the phone box:

Step 9. Remove 2 screws located in the middle left from the battery:

Step 10. Using plastic instrument, force open the flat cables on the left:

Step 11. Now, carefully remove the cable:

Step 12. Using the same instrument open the cap at the base of the flat cable:

Step 13. Remove the screw in the lower left corner of the phone:

Step 14. Remove the cap located in the top part of the phone:

Step 15. And one more, but gently:

Step 16. Remove white protective rivet:

Step 17. Take off the insulation from boards and contacts:

Step 18. We see a bolt that needs to be unscrewed/removed:

Step 19. Remove the side board:

Step 20. In the upper right corner of the phone (when viewed from the rear side) we unscrew the bolt:

Step 21. Remove the bottom cap:

Step 22. Remove the screws shown in the photo:

Step 23. Now, remove the screws that secure the antenna to the phone:

Step 24. Time to remove the corner screws:

Step 25. And another one in the other corner:

Step 26. Remove side screws on the other side:

Step 27. Remove the front bezel starting from the upper right corner:

Step 28. Disconnect the bezel from the body with a smooth but firm motion:

Step 29. So we are holding a phone or, at least, what's left of it:

Step 30. Now all you have to do is to disconnect the Home button, start the process from the back side of the phone:

Step 31. Using tweezers disconnect the button on the rear side of the phone:

Step 32. That's it, the button is in your grasp:

To replace this junk with a new button and reassemble the phone back - follow all the steps in the reverse order.