The ZTE Axon 30 is a smartphone with a 6.9 inch OLED display featuring a 120 Hz refresh rate, a Qualcomm Snapdragon 870 processor, a 4,200 mAh battery and 55W fast charging support. There are four cameras on the back of the phone, but it’s the front-facing camera that makes the Axon 30 stand out. The smartphone features the latest version of ZTE’s under-display camera technology that the company says results in better photographs and a better-looking screen. ZTE’s new under-display camera has a 16MP image sensor, and the company says it used 7 layers of transparent materials and a…