1、COMPATIBILITY: Designed for S21 FE version G990U cell phone, this screen replacement kit is compatible with organic light emitting diode screen components and can accurately replace damaged screens. 2、PROBLEM SOLVING: For replacing or repairing faulty screens, including common problems such as unresponsive screens, display issues, pixel distortion, cracked screens, touch issues, color errors, and outdated and frozen displays. 3、INSTALLATION INSTRUCTIONS: It is highly recommended to watch the repair video before purchasing to understand the difficulty level of the replacement process and what to pay attention to, you can search for S21 FE screen replacement tutorial videos on video platforms. 4、CLEAR DISPLAY: This black organic light emitting diode screen kit has excellent color accuracy, sharpness and clarity, which provides a better display on your phone, allowing you to enjoy a premium viewing experience. 5、EASY TO USE: The kit includes all the tools needed for repair, providing convenience when replacing the screen and ensuring that you are able to complete a smooth screen replacement.