You should get a full new LCD screen and digitizer when your Sony Xperia M4 Aqua screen old, touch response issues. The original screen replacement LCD may be the part you are looking for.
Screen Size: 5.0 inches
Color: Black, White, Coral, Silver
Compatibility: Sony Xperia M4 Aqua
Phone LCD Wholesale is the best place to buy for Sony Xperia M4 Aqua screen replacement assembly. Each item was double tested before shipping and 12 months warranty.