If you can’t get the bit to grip the screw properly, you can use a little bit of the water-proof sealing between the bit and the screw. That worked for me. Hope this helps anyone.

This is relevant for other guides than the display replacement guide.

I just replaced the display and the battery a few days ago. The new battery did not come with new adhesive strips, do I decided to replace the battery without any adhesive strips. Everything else went smooth. Now the phone turns off by itself and only works if the charger is in. Any idea what might cause this?

Wow, thanks!