Samsung Galaxy S21 5G SM-G991U Gray LCD ASSEMBLY. This LCD will fit G991U Samsung S21. This will not fit any other model. Tips 1: Test before installation. When testing, do not remove any protective film or tags. Please pay attention to the problem of static electricity. Before attempting any repair, be sure to ground yourself is an ESD (electro static discharge) strap. Ensure you wear eye protection and use caution not to cut your finger with the glass splinters. Tips 2: Simulates testing. Screen replacement is very fragile product. We strongly suggest test before installation. If test OK, please install it. Tips 3: Do not over-bend cable. Please make sure LCD cable Do not over-bend. Over 90 degrees bent will cause black display. What you will receive. LCD Display Touch Screen Digitizer Assembly with Frame&LCD Back Plate for Samsung S21 G991U. PLEASE MAKE SURE THIS IS BEING INSTALLED BY A PROFFESIONAL.