If the LCD screen assembly cost too expensive this is the perfect kit for repair if your cracked/damaged touch screen still functioning. The instruction not included. The repair process is not easy, also require other tools like heat gun or hair dryer and uv light to complete the repair. So we recommended you to do some research or watch some video online first before DIY. This back cover compatible with all Samsung Galaxy S20 model phone carrier, will not fit S20+/S20Ultra model. Installation is easy but we do recommended watching some video or do some research before DIY. UV Loca glue included in this kit manufacture by Huizhou DUV Electronic Materials Co. Ltd