For Nokia XR21 OEM LCD Screen with Digitizer Full Assembly Before Installation Notes 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 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: Simulated testing Screen replacement is a very fragile product. We strongly suggest testing before installation. Please perform simulated testing, which means disassembling the mobile phone, connecting the motherboard, LCD or screen, audio cable, and the new replacement, then powering on to test. If the test is successful, proceed with installation. If there is no display, please immediately. Do not force the screen into the phone. We will not be responsible once the screen is installed. Tips 3: Do not over-bend the cable Please make sure the LCD cable is not over-bent. Bending beyond 90 degrees may cause a black display. About the product 1. LCD display and touch screen digitizer assembly replacement part 2. Replace your broken or non-functional component with a new one 3. Restore your device to a like-new appearance 4. Full compatibility and proper fit 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