Samsung was recently granted a couple of design patents by the US Patent and Trademark Office, and two of them reveal possible upcoming designs for the company's phones and also cases for those phones. The new phone design shows a device that's similar to the Galaxy Note 3 in that it sports rather square edges with just a hint of roundness. The back is a bit different that you see on the Galaxy S4, and all the ports, like the USB and headphone jack, are placed at the bottom – the back also juts out quite a bit, but if the design does make it to a phone in the future (maybe the Galaxy S5?), the final product will likely be as thin and proportional as current Samsung handsets.
Meanwhile, the phone case design patent shows an evolution of the wallet-like cases Samsung already makes for its devices. There are the usual two front and back flaps, but a third flap in between the two looks designed to hold things such as credit and debit cards. Since these design patents have actually been granted, there's a high chance we'll see Samsung use either on future devices, though it could be rather long time before that happens.
Head to the source link to get more details and pictures on the phone and phone case patents.