This battery is compatible with Samsung Galaxy S8+ S8 Plus, it does not fit for Galaxy S8, please be careful before purchase.
The tools for installation are included. No instructions, there're lots of instruction videos on internet, you can find them on YouTube.
Please contact us if you have any questions, we will reply to you within 24 hrs. Abuse review or feedback will void the warranty, please contact us to resolve the issues you got with the product.
Need professional installation technology,We won't responsible for any damage due to improper operation.