Chosen Solution
My display was cracked so i decided to replace my display with icloud locked phone but i noticed that my touch responce is slow . Is it normal or the display was duplicate? Is there a way to fix it like it was before? ( I tried to use setting of touch which was shown in youtube but no progress).
The display is programmed to work with the phone it came out of. Apple parts are no longer swappable between devices because they don’t want anyone repairing their devices. Did you not get a ’none genuine screen’ warning after swapping the screen? I take it you removed your front ribbon and fitted it onto the new screen.