Process: The professionally designed screen protectors cover the curved edges and fit perfectly with the Samsung Galaxy A50/ A30/ A20/ M30/ A30S/ A50S. It is made of high-quality 9H tempered glass and has been specially processed. The fingerprint unlocking area is suitable for nano-synthesis technology and fully supports the unlock function. Sharp objects such as the nib do not cause any scratches on the screen. Fall protection effectively reduces the risk of steel film splitting. Feature: High sensitivity Effectively prevents dirt, dust, oil, and sweat Automatic bubble adsorption, waterproof and shockproof Case-friendly, fully covered tempered glass. Installation Method: 1. Clean the phone screen with a lint-free cloth. 2. Remove the supplied dry wipes. 3. Wipe the phone screen with a damp cloth and wipe dry. 4. Use the included vacuum cleaner to clean dust or dots on your phone screen. 5. Remove the adhesive back cover from the screen protector. 6. Arrange the screen protector and connect to the phone screen. Important points to note: 1. Please adjust the sensitivity in the system to the highest level. 2. When you paste, be sure to keep the screen clean and dust-free, especially the fingerprint unlocking area. 3. Please ensure that the screen protector is closely attached to the phone and the position is accurate when installing. Be sure to pay attention to the above steps to achieve the perfect fingerprint effect. ?Warm Tip?--- Not Compatible with Fingerprint Scanner. Service: Your satisfaction matters! We promise 180 days warranty (Replacement & Refund) and lifetime friendly customer service. If you have any questions, please feel free to contact us.