It turned out that the display got scratched when a genuine cover case was attached to Galaxy S6 / S6 edge - GIGAZINE
Luxury Mirror Clear View Case For Samsung Galaxy S6 S7 Edge S8 S9 S10 Plus S10 Lite Phone Cover Plating Base Vertical Stand From Emmadigitalinfo, $3.48 | DHgate.Com
Best Buy: mophie Juice Pack External Battery Case for Samsung Galaxy S6 edge Cell Phones Black 45123BBR
Amazon.com: Phone Case for Samsung Galaxy S6 Edge Plus with Tempered Glass Screen Protector Cover and Cell Accessories Slim Silicone Dual Layer Armor Glaxay S6edge + S 6edge 6s 6 Edge+ Women
Amazon.com: Samsung Galaxy S6 Edge Plus Case S-View Clear Flip Cover - Black Sapphire : Cell Phones & Accessories
Smart Mirror Flip Phone Case For Samsung Galaxy S10 5G S10E S10 S9 S8 S7 S6 Edge Plus Lite Note 9 8 5 4 3 Case Clear View Cover _ - AliExpress Mobile
Samsung Official Clear View Cover for Galaxy S6 Edge-Black Sapphire - YouTube
Amazon.com: Samsung Galaxy S6 Edge Plus Case S-View Clear Flip Cover - Black Sapphire : Cell Phones & Accessories
Samsung Clear View Cover EF-ZG925B - Flip cover for cell phone - polycarbonate - green - for Galaxy S6 edge - Walmart.com
Official Samsung Galaxy S6 Edge Clear View Cover Case - Silver