Reviewed by a pro

The tablecloths are obviously the wrong size (those who say that one of the two is too short have folded improperly, it happened to me when repairing my first iphone)
Instead, I bought two of these screens and each of them, the proximity sensor was inoperative after the repair.
By submitting an original Apple broken screen to test the sensor works again.
So this is the screen that is involved.
This happens to me 1-2 times out of 10 (out of 150 repairs to date) and this happens only on iPhone 4 and not on the 4S (will include)

With a small process (pro secret stupid but I put six months to find), the sensor works again without problems :-)

Last negative point: when pressed lightly on the screen, we see a small LCD to the momentary halo or is pressed, but it's really not a problem. However, on the original Apple screen, this phenomenon is not found.

For the rest, it's all good! :-)