Tempered Glass Screen Protector (2.5D) Microsoft Lumia 640 (T-Mobile/MetroPCS) Microsoft Lumia 640 (at&T/Cricket) 0.3mm thick premium-grade tempered glass screen protector provides maximum image clarity and ultimate touch screen sensitivity. 9H hardness scratch-resistant surface provides high resistance to shock, impact and damages from sharp objects. Polished, rounded-edge design offers a smooth feel to the perimeter while providing ultimate impact protection to the screen. Shatterproof technology keeps the user and phone safe from scratches and damages if broken. Oleophobic coating prevents excessive fingerprints and oil stains from contaminating the surface, making it easy to clean.