You can already buy a Samsung Galaxy S6 case on Amazon
Amazon.com: Phone Case for Samsung Galaxy S6 Edge Plus with Tempered Glass Screen Protector Cover and Cell Accessories Slim Silicone Dual Layer Glaxay S6edge + S 6edge 6s 6 Edge+ Women Men
Amazon.com : SAMSUNG Galaxy Tab S6 Lite 10.4" 128GB WiFi Android Tablet w/ S Pen Included, Slim Metal Design, Crystal Clear Display, Dual Speakers, Long Lasting Battery, SM-P610NZAEXAR, Gray : Electronics
Amazon.com: DIY Phone Case for Samsung Galaxy S6 Edge, Create Your Own Customized Phone Case, Personalize Phone Case by Yourself : Cell Phones & Accessories
Amazon.com: Phone Case for Samsung Galaxy S6 Edge Folio Flip Wallet Case,PU Leather Credit Card Holder Slots Heavy Duty Full Body Protection Kickstand Hard Hybrid Protective Phone Cover S6edge 6s 6 S