Chosen Solution
I followed the guide to change display with frame. Now I notice that my phone has problems to receive gsm signal, above all when it’s indoor. Looking the old frame, I see that there are some little pieces of conductive tapes in precise points
Maybe thes points are useful to connect motherboard to ground?
Static electricity can cause bad signals with antenna’s so maybe try to buy some conductive tapes and placing them on these points to get that charge out of there. It should be worth the try
