I know you are looking for Redmi 4X QCN file, so you have come to the right place. Your phone problem is baseband unknown, IMEI Repair Re write, IMEI null, no service, emergency call, WiFi and bluetooth not working ETC. You can solve all problems with this QCN file. I will write below how to write QCN.
Redmi 4X Detail
Name
Details
QCN Name
Redmi 4X
Support Tool
QFIL
Download Size
776 KB
QCN Compressed
WinRAR And 7Zip.
Password
Free
Tool Uploaded By
GSMPROFIX
Upload Drive
Google Drive/MEGA/MediaFire/AFH/ ETC
Redmi 4X QCN
Redmi 4X Diag Port Enable.
The model of your phone is Redmi 4X.
Go to dial pad and dial *#*#717717#*#*
Diag port enable popup will appear on the display when Diag Port is open.
If the diag port is not open then enable it with 3rd party tool.
Once enabled you will see on your computer go to my properties, qualcomm hs-usb diagnostics 9001
Redmi 4X QCN Write QFIL Tool.
If you install 7z or winrar on your computer, it will be convenient to work.