This screen is designed for LG K51 , please check your phone model before purchase. All the screens have been tested before shipping. We provide tools for repairing, no instructions included, you can find lots of instruction videos on YouTube or find a technician for help. When you install this screen, please carefully align the port and connected it properly. Do not over-bend the cable, do not press the screen too hard. If you have any questions or got any issues with our product, please feel free to contact us, we will reply to you within 24 hrs. We highly appreciate your kind patience. Need professional installation technology,We won't responsible for any damage due to improper operation. How to Install / Tips: 1)The flex cable is very sensitive and is easily damaged. Handle carefully. 2)Special tooling and skills are required for replacing this parts. 3)Please try to handle the repair or replacement work in a dry and dust free environment without direct sunlight. 4)The installation of this item should be done by a qualified person.