Original post by: Jonathan Ruel ,
I found the fix! So I figured out that I was NOT connecting the proximity/front camera ribbon cable fully. It was 75% connected. I kept disconnecting then reconnecting the ribbon cable..Then finally I gave it one final press & I felt the ribbon cable click into place. Fixed! I was mostly confused on how the phone was reacting with the proximity/front camera cable partially connected. When it was partially connected - the phone would malfunction. It did not recognize the home button which automatically put on assisstive touch. Then the screen would have tremendous lag when switching through panels. All in all, make sure that proximity/front camera ribbon CLICKS into place! It may look as if the cable is flat, connected but the right side was not fully connected. I did not even need to use the new replacement proximity/front camera.