Dos and Don'ts 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. 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 with the glass splinters. 2. Simulates testing Screen replacement is very fragile product. We strongly suggest test before installation. Please simulates testing, which means mobile phone apart, Screen Outer Glass Lens connected audio cable and new replacement, power on, test finished. If test OK, please install it. If it can't show, please contact us at the very first time. And please don't force it to be installed in mobile phone. We will not be responsible once the screen is installed. 3: Do not over-bend cable Please make sure LCD cable Do not over-bend. Over 90 degrees bent will cause black display. Features 1. High quality outer glass lens for Microsoft Lumia 950 XL 2. Replace the old, broken, cracked, damaged one 3. Complete fit and work 4. Each item has been checked and in good condition before shipping 5. Professional installation is highly recommended. We will not be responsible once the screen is installed.