I finally finished it.i changed it a month ago, but always had problems with the proximity sensor.it was tricky because I had to change the metal frame to, because the display came without.when I glued it together a bit of glue went right over the inside of the display where the proximity sensor lays.I didn't see it until yesterday when I found some time to inspect it.I cleaned it and now it works.so glad.thanks for your advice.bye.