At one time, the matrix screens for smartphones made by technology AMOLED, made a lot of noise with greater contrast and displays a great range of colors than the IPS screen. Plus backlight is not straining your eyes, which comfortably use at night without fear of ruin eyesight. Now release the next screen technology Super AMOLED and Super AMOLED Advanced, which are thinner, lower power consumption, high brightness and reflect less sunlight. However, Chinese companies, for various reasons, but primarily cost savings, virtually put on their smartphones AMOLED screens. The first 4G