An unknown nubia device bearing model number NX627J, said to be the upcoming Z20, has appeared on TENAA with its full specs. The smartphone is powered by an octa-core processor clocked at 2.95 GHz which is likely the recently announced Snapdragon 855+ SoC. It will come in three RAM options - 6GB, 8GB, and 12GB - while storage will be 128GB, 256GB, and 512GB. That said, the most interesting bit about the Z20 is that it will sport two OLED displays - one each on the front and back with a resolution of 2340x1080 pixels. The main screen on the front will measure 6.42" diagonally, while the...