A little Redmi Note 3 petting. 
Hugo Barra and Jai Mani have subjected the Redmi Note 3 to a series of durability tests to demonstrate the durability of the glass used. Many fans questioned its durability when it was revealed that the Redmi Note 3 did not have Corning Gorilla Glass protection. However, this video proves that the mysterious glass can withstand the wrinkles. For those who want to know the science behind this, screen durability is measured by the Vickers directional hardness test or Wanting the science behind these things, screen durability is typically measured by the Vickers hardness test and the result obtained with this is also known as the DPH value. You can check out the video on how this value comes out, which is DPH values for the Redmi Note 3 are 649-670 kp/mm2 For comparison, the Corning Gorilla Glass 4 only scores a Vickers hardness based on DPH of 596 kgf/mm2.
The reason for the unspecified figure is that Xiaomi is in contact with several suppliers for the built-in glass. However, as noted by Barra in the video, the lower end of the scale is still the same as the most popular protection solution in India. This may also explain why Xiaomi has not given it its own name. The video itself is quite entertaining too, as it has the usual key scratch test before Barra rolls through it and then a barbell is thrown at him. It even withstands Jai and Hugo running over the Redmi Note 3 while entering the garage. Surprisingly, the phone turns on and works perfectly. Finally, Hugo drops it on the ground...
source: http://en.miui.com/thread-243337-1-1.html
