The vibrator screws, audio button / mute switch screws, and power button shield screws are tighter than the rest inside the phone. Be exceptionally careful to apply good pressure and go very slow (not much torque, minimum possible) to ease out these screws. The rest of the screws in my phone seemed to be much easier to remove without stripping anything. I ended up stripping the very last screw for the audio button shield as it was in there super tight. Either that or whoever assembled it in the factory tightened it too much and maybe did the stripping for me.