For Samsung Galaxy A13 4G SM-A135F OEM LCD Screen With Digitizer Full AssemblyBefore Installation NotesTips 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 with an ESD (electrostatic discharge) strap. This will prevent static electricity from damaging the electronic components within the phone. Ensure you wear eye protection and use caution not to cut your finger on glass splinters.Tips 2: Simulate testing Screen replacement is a very fragile product. We strongly suggest testing before installation. Please simulate testing by disassembling the phone, connecting the motherboard, LCD or screen, audio cable, and the new replacement, then power on to test. If the test is successful, proceed with installation. If there is no display, immediately. Do not force installation. We will not be responsible once the screen is installed.Tips 3: Do not over-bend cable Please make sure the LCD cable is not over-bent. Bending beyond 90 degrees may cause black display.About the product 1. LCD display and touch screen digitizer assembly replacement part. 2. Replaces old, broken, cracked, or damaged screens. 3. Restores your device to like-new condition. 4. Fully compatible and functional. 5. Each item is tested and in good condition before shipping. 6. Professional installation is highly recommended. We will not be responsible after the screen is installed.