Chinese smartphone brand Oppo launched the Find X last year with a slider design that also led some other phone makers to follow suit. Now the company has been granted a patent for another slider design smartphone, but this one's a tad different from the Find X. The Find X came with three cameras - two at the back and one on the front - which were all concealed inside the smartphone and were accessed through a slider. However, the sketches of Oppo's possibly next slider smartphone show that its dual rear cameras will sit on the back of the phone in the left corner, always exposed. Only the...