Fix Touchscreen Problem/Ghost Touch on Redmi 5 Plus (Vince) When Device Overheat/Gaming
Gan 1. Download the MIUI China version 9.6.3.0 (Since there's not available fw only on 9.6.3.0 version so we should've full flash rom)
2. How to flash selected according to how you flashing, recovery in twrp, fastboot in miflash, whatever)
3. Remember! China MIUI version 9.6.3.0 was oreo, if you were on OS above it #cleanflash mandatory!
4. Back up the data, internal storage will wipe everything
5. Flash lazyflasher/dm-verity after you flash rom zip file, so you'll not missing TWRP
6. Reboot, patient and wait for it to boot!
7. Signed homescreen, go to Test Mode by tapping/click kernel version several times to appear on its own or by way of a dial *# *#64663#*#*
8. Look to the information and there will be a version of the firmware
9. Usually, on Tianma version firmware will be up to v54
10. If you done with everything, you want to return to custom rom or MIUI version above it (Global / China / Eu) is up to you, it will not change fw version so don't worry.