SIM and signal problem
After screen replacement with frame phone works fine, BUT when i insert SIM it doesnt recognize it...it takes few minutes to ask for PIN.
After i enter PIN there is no service and no signal...i cant even turn off 4G etc.
I tried to put back old screen with frame, that has broken touchscreen but problem still there. i changed antena cable, and every other part inside.
SIM reader looks fine.
i tried factory reset, and software repair with xperia companion