You should get a full new display assembly when your Xiaomi Mi 4 screen cracked, touch response issues. The high quality screen replacement LCD may be the part you are looking for.
Screen Size: 5.0 inches
Color: Black, White
Compatibility: Xiaomi Mi 4
Phone LCD Wholesale is the best place to buy for Xiaomi Mi 4 screen Replacement and digitizer. Each item was double tested before shipping and 12 months warranty.