This battery is compatible with LG G6 H870 H871 H872 LS993 VS998, can replace your old battery, please check your phone model before purchase. we provide tools for installation, no instructions included. You can find some instruction videos on YouTube or find a technician for help if you don't know how to replace your battery. When you replace your old battery, please carefully and gently disconnect your old battery's cable then connect your new battery to the mainboard. If you phone cannot be powered on with the new battery, you may need to install it again and be sure to check if the cable has been properly connected. 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. The tools for repairing are included. the adhesive tapes are pre-attached. No installation instruction, you can find lots of instruction videos on internet or find a technician for help.