The Oppo Find 7 has finally been launched by the Chinese manufacturer and it means we now have two QHD (2K) display smartphones on the market.With a resolution of 1440 x 2560 on a 5.5-inch display the Find 7 delivers a staggering 538ppi. To put that in some perspective the 5.1-inch Galaxy S5 boasts 432ppi while the 4-inch iPhone 5S clocks in at just 326ppi.