Xiaomi MIX 4 LCD, USB Flex,Sim Tray and Buttons replacement, Fingerprint calibration without tool
Tools and replace meant parts used :
1) Hot air gun
2) B-7000 glue
3) Plastic pry tool
4) Hot Glue Gun
5) ISO Propyl Alcohol
6) USB Flex replacement
7) Replacement Sim tray
8) LCD replacement panel
if the screens glass is obliterated into pieces, do cover it with tap so as the glass pieces don't cause any damage.
if you want to know where I bought the parts from, do message me in the comments section below.